Difference between revisions of "Megastructures"

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{{version|1.9}}
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{{version|2.3}}
[[File:Utopia Loading Screen.png|thumb|350px|Humanoid Empire constructing a Dyson Sphere]]
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[[File:Utopia Loading Screen.png|thumb|320px|Humanoid Empire constructing a Dyson Sphere]]
{{expansion|utp|small=no}}
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Megastructures are colossal constructions. Expensive and time-consuming to build or repair, these remarkable feats of engineering are nonetheless important wonders that provide large bonuses, demonstrating the technological and economic primacy of the builders' empire. All of them require unlocking certain [[technologies]] to be built.
{{hatnote|'''Note:''' Ringworlds can be restored even without Utopia enabled.}}
 
''Megastructures'' are colossal object constructions. Expensive and time-consuming, these remarkable feats of engineering are nonetheless important wonders that provide large bonuses, demonstrating the technological and economical primacy of the builders' empire.
 
  
It is possible to find ruined megastructures spread in the galaxy to repair and restore them into their final form. Doing so allows saving a lot of the resources required to construct them. While restoring the megastructures does not require any {{iconify|ascension perk|21px}}s, it does require the player having researched the technology {{icon|Mega Engineering|21px}} {{tech|rare|Mega Engineering}}.
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== Construction ==
  
There are two types of megastructures. Habitable projects and Galactic Wonders. Galactic Wonders provide massive bonuses and cannot be destroyed by any crisis but are limited to one per empire. They also have a different texture depending on the empire that built them.
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There are three types of megastructures: [[Megastructures#Gateways|gateways]], [[Megastructures#Habitable_megastructures|habitable projects]] and [[Megastructures#Galactic_Wonders|galactic wonders]]. Systems can only host one galactic wonder. Habitable megastructures (habitats and ringworlds) can be colonized but will be irreparably destroyed if a crisis overruns them. Galactic wonders provide massive bonuses and cannot be destroyed by any crisis, but are limited to one per empire. All megastructures have a different textures depending on the empire that built them.
  
It is only possible to build, upgrade, or restore one megastructure at a time, except in the case of habitats.
+
It is only possible to build, upgrade, or restore one megastructure at a time, except in the case of habitats and gateways. The limit can be increased by one with the Master Builders perk, and one more with the Architectural Renaissance Ambition edict.
  
== Ascension Perks ==
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A construction ship is required to build the first stage of any megastructure. If the megastructure has multiple stages, the following stages do not require the construction ship.
A number of [[Ascension Perks]] enable or affect the building of Megastructures.
 
  
=== Voidborne ===
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Each megastructure is unlocked by researching the technology of the same name. An empire that conquers a system with a megastructure can use it, but if the construction was partial it will not be able to continue its construction without the required technology. Damaged megastructures found through exploration, however, can be reconstructed by unlocking the {{iconify|Mega Engineering|21px}} technology.
This Perk enables the building of Habitats. It has significantly lower requirements than the perk for the other Megastructures, requiring only some of the prerequisites of {{iconify|Mega Engineering|21px}} rather than the tech itself.
 
  
=== Galactic Wonders ===
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=== Bonuses ===
Requires {{iconify|Mega Engineering|21px}} and three previous ascension perks. Enables the Dyson Sphere, Science Nexus and Sentry Array. What each of these Megastructures have in common is that they provide effects and bonuses without any of the disadvantages associated with a colonized planet and their presence in a system is not incompatible with habitats.
+
A few bonuses affect megastructure construction speed. These are highly desirable considering the great time requirements of such projects:
 +
* [[File:ap master builders.png|link=Ascension perk|Master Builders|21px]] Master Builders ascension perk increases the build speed by {{green|+50%}}
 +
* {{icon|edict}} Living Metal Mega-Construction edict increases the build speed by {{green|+50%}}
 +
* {{icon|edict}} Architectural Renaissance unity ambition also increases the build speed by {{green|+50%}}
  
=== Circle of Life ===
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== Gateways ==
Requires {{iconify|Mega Engineering|21px}}, [[File:ap voidborn.png|link=Ascension perk|Voidborne|21px]] Voidborne and three previous ascension perks. Enables the construction of Ringworlds. They offer extreme living space at higher efficiency than Habitats. However the system they are built in must be devoid of habitable planets as in the construction of the ringworld all planets will be destroyed to supply the materials. You can build an infinite number of these.
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{{SVersion|2.3}}
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[[File:Distant Stars Loading Screen.png|thumb|320px|Real scale of a Gateway]]
 +
While exploring the galaxy, empires can find abandoned gateways that were once part of a massive, galaxy-spanning network. Reverse-engineered from encountered abandoned gateways, these megastructures require the {{iconify|Gateway Activation|21px}} technology and can be used to travel directly to any other active gateway in the galaxy. Reactivation of gateway takes 2 years and costs {{red|6000}} {{iconify|energy}} and {{red|2500}} {{iconify|alloys}}. The  {{iconify|Gateway Activation|21px}} technology can appear as a research option as soon as a Gateway has been discovered and {{iconify|Hyperspace Slipstreams|21px}} technology has been researched but the chance is very low. Owning a system with an inactive Gateway increases the chance for the tech to appear by 4 times.
  
=== Master Builders ===
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When the first gateway in the galaxy is reactivated, another random gateway will also be re-activated along with it. As opposed to [[FTL#Wormholes|wormholes]], both gateways must be owned by the same empire or two empires with open borders in order to be able to travel through them. Systems with gateways count as bordering for the purposes of [[Exploration#The_L-Cluster|diplomacy]], so every opened gate increases diplomatic tension between all active gate-owners. [[Claims]] cannot be extended through gateways. Additionally, gateways are able to greatly enhance and simplify [[trade]] infrastructure.
[[File:ap master builders.png|link=Ascension perk|Master Builders|21px]] Master Builders will increase the buildspeed of Megastructures by {{green|+100%}}. It requires {{iconify|Zero Point Power|21px}} and instantly unlocks {{iconify|Mega Engineering|21px}} if not unlocked already.
+
 
 +
Eventually, empires can build their own gateways by researching the {{iconify|Gateway Construction|21px}} technology. Notice, that this tech requires having some civilization with an access to pre-existing gateways, so if gateways were disabled during [[galaxy]] creation it is impossible to build any new<!-- do l-gates count here?-->. Each system can have only one gateway, but black hole systems with an [[L-Gate]] can also have a regular gateway constructed. Gateways can be built in systems in which there is already a megastructure. The construction site is built in only 3 years and costs {{red|100}} {{iconify|influence}} and {{red|2500}} {{iconify|alloys}}. Upgrading it to a gateway takes 5 years and costs {{red|6000}} {{iconify|energy}} and {{red|2500}} {{iconify|alloys}}.
  
 
== Habitats ==
 
== Habitats ==
{{SVersion|1.9}}
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{{SVersion|2.3}}
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{{expansion|utp}}
 
[[File:Mammalian Habitat.jpg|thumb|200px|Mammalian habitat.]]
 
[[File:Mammalian Habitat.jpg|thumb|200px|Mammalian habitat.]]
An artificial planet in all but name, these '''Habitats''' offer 12 tiles to work coupled with {{green|100%}} {{iconify|habitability}} for all species. Its appearance is dependent on the builders' empire appearance. The constructed habitat still requires colonization but colonizing them is free.
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Artificial planets in all but name, habitats have a {{iconify|planet size}} of 6 to work coupled with {{green|70%}} {{iconify|habitability}} for all species. Its appearance is dependent on the builders' empire appearance. The constructed habitat still requires [[colonization]].
  
Habitats have a [[Buildings#Habitat|unique set of buildings]] distinct from normal planetary ones. This set of buildings has good {{iconify|Energy}} and {{iconify|research}} yields, but is less effective for generating {{iconify|Food}} and {{iconify|Minerals}}. Gene Clinics, tradition and Horizon Signal buildings can also be constructed.
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Habitats have a unique set of Districts distinct from normal planetary ones. Up to 3 Districts are shared among all Habitats, with a fourth one being available if the Habitat is built above a planet with a resource deposit. Generator Districts are available for energy deposits, Mining Districts are available for mineral and alloy deposits (which are added as a rare feature to the habitat), and research districts become available for any celestial bodies that provide research boosts. The districts are only capped by the maximum amount of districts for that station (6 or 8, see below).
  
The project takes {{red|5}} years to complete and costs a total of {{red|150}} {{iconify|influence}} and {{red|5000}} {{iconify|minerals}}.  
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The project takes {{red|5}} years to complete and costs a total of {{red|200}} {{iconify|influence}} and {{red|3000}} {{iconify|alloys}}. Unlike other megastructures habitats do not require a construction site and are finished in one go by the construction ship.
  
Requires the [[File:ap voidborn.png|link=Ascension perk|Voidborne|21px]] Voidborne ascension perk, which does not require Mega Engineering, only the Battleship and Fortress technologies.
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Habitats require the {{iconify|Orbital Habitats|24px}} technology to be built. The [[File:ap voidborn.png|link=Ascension perk|Voidborne|21px]] Voidborne Ascension Perk increases their {{iconify|Habitability}} to {{green|90%}} and {{iconify|District Cap}} to {{green|8}}. They cannot be built on moons or planets with an [[anomaly]].
It cannot be built on habitable planets, asteroids, moons or planets with an anomaly.
 
  
While habitats cannot be destroyed by normal empires there is a war demand to disassemble them.
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If a habitat is destroyed by a crisis or World Cracker it will never be possible to build another habitat on the same spot, or even a mining/research station, so any {{iconify|strategic resources}} on the planet are permanently lost.
  
=== Strategy ===
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== Multi-stage megastructures ==
Habitats have considerable production penalties for both Minerals and Unity, as they effectively act as a rather small planet. However, they offer superior Energy and Science income, while doubling as an Orbital Farm. They also require considerably less micromanagement, because none of the buildings need upgrades nor provide adjacency bonuses. Of all the megastructures, they have the least onerous requirements in terms of technology and placement.
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{{SVersion|2.3}}
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Multi-stage megastructures are constructed in multiple stages. Almost all of them can only be constructed once. They start with a construction site that provides no benefit, however each subsequent construction phase will bring increasing bonuses, culminating with the end of the megastructure construction. Habitats and gateways can be built in the same system as multi-stage megastructures.
  
Habitats are uninhabited when they are built and need to be colonized although this does not require influence like planets do. They will also inherit orbital tile deposits from their orbiting planet.
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These Megastructures can only be built once per empire and require the technology of the same name before they can be constructed. However their bonuses are massive and they cannot be destroyed, only captured.  
  
If a habitat is disassembled, it will strangely never be possible to build another habitat, or even a mining/research station, orbiting the planet, so any strategic resource on the planet is permanently lost. What's more, habitats can't have spaceports, so if an empire has only habitats and no planets, it will never be able to build ships.
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Multi-stage megastructures conquered from other empires do not count against the build limit, nor do ruined ones that are found and repaired.
 
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{| class="wikitable mildtable" cellspacing="2" cellpadding="4" width="100%"
== Ringworlds ==
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! style="width:25%" colspan=2 | Megastructure
{{SVersion|1.9}}
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! style="width:20%" | Production
[[File:Ring World.jpg|thumb|200px|Ring world.]]
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! style="width:10%" | Upkeep
Immense in both radius and scope, these '''Ringworlds''' encircle their system's sun and award their owner four {{green|25 tile sized}} sections when fully constructed. Its carefully designed ecosystem and finely-tuned atmosphere offer perfect living conditions towards all residing species, giving them {{green|100%}} {{iconify|habitability}} on the ringworld.
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! style="width:10%" | Time
 
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! style="width:10%" | Cost
The project takes {{red|58⅓}} years to complete and costs a grand total of {{red|300}} {{iconify|influence}} and {{red|110 000}} {{iconify|minerals}}. With the [[File:ap master builders.png|link=Ascension perk|21px]] Master Builder ascension perk it takes {{red|29⅙}} years instead. However, because each section is built separately after the completion of the frame, the Ringworld can be a valuable and productive asset long before its completion.
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! style="width:23%" | Notes
 
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! style="width:1%" | AP
The initial site is built by a construction ship around the star, and cannot be begun if another construction ship is building a megastructure or if the system contains habitable planets. Once the site is complete, it constructs the subsequent sections without the need for a construction ship.
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! style="width:1%" | DLC
 
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|-
Ringworlds cannot be built around black holes. All planets in the system are consumed upon the completion of one of its frame.
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| rowspan=6 style="vertical-align:top;border-top:2px solid black" | '''Ring World'''<br>[[File:Evt Ringworld.png|195px]]
 
+
| style="border-top:2px solid black" | '''Site'''
Requires the [[File:ap the circle of life.png|link=Ascension perk|21px]] The Circle of Life ascension perk. The following list shows the upgrade order.
+
| style="border-top:2px solid black" | None
 
+
| style="border-top:2px solid black" | {{icon|energy}} {{red|-5}}  
{| class="mildtable sortable" cellspacing="2" cellpadding="4" width="100%"
+
| style="border-top:2px solid black" | {{icon|time}} {{Hover box|1&#8239;800|5 years}}<br>[[File:ap master builders.png|Master Builders|21px]] {{Hover box|1#8239;200 days|3.33 years}}
! style="width:25%" colspan=2 | Type
+
| style="border-top:2px solid black" | {{icon|influence}} {{red|300}} <br>{{icon|alloys}} {{red|5&#8239;000}}
! style="width:25%" class="unsortable" | Upkeep
+
| rowspan=6 style="border-top:2px solid black" |
! style="width:25%" class="unsortable" | Time
+
* Cannot be built around Black Holes or in systems with multiple stars
! style="width:25%" class="unsortable" | Cost
+
* Cannot be built if there are habitable planets, anomalies or stations present
|- id="Ring World Site"
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* Unlike other multi-stage Megastructures an empire can build more Ring Worlds
| style="width:1%" | [[File:Ring World Site.png|100px]]
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* All segments feature {{green|+100%}} {{iconify|Habitability}} for each species, can build up to 5 [[Planetary management#Ring World districts|unique Districts]] and have their own unique Designations
| '''Site'''
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* If they are built in the L-Cluster the uninhabitable segments will have {{iconify|Nanites}} deposits
| {{red|-5}} {{icon|energy}}
+
* Upon completion of the frame all planets are removed from the system
| {{Hover box|5 years|1 800}} {{icon|time}}
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* Multiple segments can be built at the same time if you have the capacity to work on more than one megastructure simultaneously
| {{red|300}} {{icon|influence}}<br>{{red|10 000}} {{icon|minerals}}
+
| rowspan=6 style="border-top:2px solid black" | [[File:ap galactic wonders.png|24px]]
|- id="Ring World Frame"
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| rowspan=6 style="border-top:2px solid black" | {{icon|utp}}
| style="width:1%" | [[File:Ringworld frame.png|100px]]
+
|-
| '''Frame'''
+
| '''Stage I (Frame)'''
 +
| None
 +
| None
 +
| {{icon|time}} {{Hover box|4 800 days|13.3 years}}<br>[[File:ap master builders.png|Master Builders|21px]] {{Hover box|3 200 days|8.88 years}}
 +
| {{icon|alloys}} {{red|10&#8239;000}}
 +
|-
 +
| '''Stage II (1 Segment)'''
 +
| [[File:Planet ringworld.png|24px]] {{green|+1}} Habitable Segment
 +
| None
 +
| {{icon|time}} {{Hover box|3 600 days|10 years}}<br>[[File:ap master builders.png|Master Builders|21px]] {{Hover box|2 400 days|6.66 years}}
 +
| {{icon|alloys}} {{red|10&#8239;000}}
 +
|-  
 +
| '''Stage III (2 Segments)'''
 +
| [[File:Planet ringworld.png|24px]] {{green|+2}} Habitable Segments
 
| None
 
| None
| {{Hover box|13 years and 4 months|4 800}} {{icon|time}}
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| {{icon|time}} {{Hover box|3 600 days|10 years}}<br>[[File:ap master builders.png|Master Builders|21px]] {{Hover box|2 400 days|6.66 years}}
| {{red|20 000}} {{icon|minerals}}
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| {{icon|alloys}} {{red|10&#8239;000}}
|- id="Ring World Section"
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|-  
| style="width:1%" | [[File:Ring World Habitable.png|100px]]
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| '''Stage IV (3 Segments)'''
| '''Completed Section'''
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| [[File:Planet ringworld.png|24px]] {{green|+3}} Habitable Segments
 
| None
 
| None
| {{Hover box|10 years|3 600}} {{icon|time}}
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| {{icon|time}} {{Hover box|3 600 days|10 years}}<br>[[File:ap master builders.png|Master Builders|21px]] {{Hover box|2 400 days|6.66 years}}
| {{red|20 000}} {{icon|minerals}}
+
| {{icon|alloys}} {{red|10&#8239;000}}
|-
+
|-  
|}
+
| '''Stage V (Complete)'''
 
+
| [[File:Planet ringworld.png|24px]] {{green|+4}} Habitable Segments
=== Strategy ===
 
The Ringworld offers a massive amount of living space (100) while only counting as 4 Planets. The big limitation is that there are only very few Systems one can build them in, as the system requirements are identical to the ones for a Dyson Sphere, except it also needs a lot of planets to be used for raw material. Like Habitats it also requires a separate Ascension Perk from the other Megastructures. It is the only Megastructure that is exclusive for its system, as its creation will consume all other stellar bodies in the system.
 
 
 
=== Construction Events ===
 
The following events can take place while constructing a Ringworld:
 
* Favorable leadership conditions increase the building speed by 20%.
 
* A mineral deposit is discovered and you are given the option to halt construction for 20 days to get 500 {{iconify|minerals}} or proceed with the schedule.
 
* A number of workers might go missing, delaying the construction for a month. Two months later it will be revealed that one of the planets used in the construction had a species of furry worms the workers have grown fond of. You are given the option to either exterminate them and delay construction for a month or allow them on the building site. Whatever choice is made a month later the worms will be found feeding on the missing workers underground and be exterminated.
 
* Another empire might contact you, thinking that you are making weapons of mass destruction on your ring world. They will want to inspect the ring world. If you accept the request the construction will be halted and the empire gets the "Request Accepted" opinion modifier (+40 {{iconify|opinion}}, -2 yearly). If you declined they get the "Request refused" modifier.
 
 
 
=== Conquerable Ringworlds ===
 
Up to 7 Ringworlds can spawn "naturally" in a game in various states. Damaged segments can be repaired with the {{iconify|mega-engineering|21px}} tech.
 
* 1 in the Sanctuary system. All 4 habitable sections are intact and each contains one pre-FTL civilization, none advanced beyond Steam Age. The system was abandoned by an Enigmatic Observer Fallen Empire but contains automated defense platforms totaling over 50k Fleet Power.
 
* 3 in the systems of the Ancient caretakers (if ''Synthetic Dawn'' is installed) or Keepers of Knowledge (if ''Synthetic Dawn'' is not installed). The ringworld in the home system has 3 intact and one ruined section while the other two ringworlds are completely ruined and require each section to be repaired separately.
 
* 1 in Cybrex Alpha. It requires completing the Cybrex precursor event chain. The ringworld is completely ruined and requires repairs on each section.
 
* 1 in Cybrex Beta. The system will only be revealed if the Contingency sterilizes 20% of the galaxy. A short time after the Contingency is defeated the Cybrex will leave the galaxy, leaving the ringworld free for the taking.
 
* 1 in a random empty system if Utopia is installed. It is completely ruined and each section requires repair.
 
 
 
== Galactic Wonders ==
 
These megastructures require the [[File:ap galactic wonders.png|link=Ascension perk|Galactic Wonders|21px]] Galactic Wonders ascension perk and can only be built once per empire. However their bonuses are massive and they cannot be destroyed, only captured. Habitats can also be built in the same system as Galactic Wonders. Each Galactic Wonder starts with a construction site costs {{red|300}} {{iconify|influence}} and {{red|10 000}} {{iconify|minerals}} and provides no benefit. However each subsequent construction phase will bring increasing bonuses, culminating with the end of the megastructure construction.
 
 
 
Galactic Wonders conquered from other empires do not count against the build limit. Nor do ruined ones that are found and repaired.
 
 
 
=== Dyson Sphere ===
 
{{SVersion|1.9}}
 
[[File:Dyson Sphere.jpg|thumb|200px|Dyson Sphere.]]
 
These multi-staged, truncated icosahedron-shaped structures harness the energy output of an entire [[star]]. A fully constructed '''Dyson Sphere''' provides a whopping {{green|+1000}} {{iconify|energy}}.
 
 
 
All rocky planets and moons in the system turn into frozen or cold barren [[worlds]] upon its completion due to the lack of thermal radiation they would receive considering the star has been mostly completely encased.
 
 
 
The project takes {{red|55}} years to complete and costs a grand total of {{red|300}} {{iconify|influence}} and {{red|260 000}} {{iconify|minerals}}. The following list shows the upgrade order.
 
 
 
'''Note:''' The amount of {{iconify|energy}} provided does not vary between different star types.
 
 
 
{| class="mildtable sortable" cellspacing="2" cellpadding="4" width="100%"
 
! style="width:20%" colspan=2 | Type
 
! style="width:20%" | Produces
 
! style="width:20%" class="unsortable" | Upkeep
 
! style="width:20%" class="unsortable" | Time
 
! style="width:20%" class="unsortable" | Cost
 
|- id="Dyson Sphere Site"
 
| style="width:1%" | [[File:Dyson Sphere Site.jpg|100px]]
 
| '''Site'''
 
 
| None
 
| None
| {{red|-5|back}} {{icon|energy}}
+
| {{icon|time}} {{Hover box|3 600 days|10 years}}<br>[[File:ap master builders.png|Master Builders|21px]] {{Hover box|2 400 days|6.66 years}}
| {{Hover box|5 years|1 800}} {{icon|time}}
+
| {{icon|alloys}} {{red|10&#8239;000}}
| {{red|300|back}} {{icon|influence}}<br>{{red|10 000|back}} {{icon|minerals}}
+
|-
|- id="Dyson Sphere Frame"
+
| rowspan=6 style="vertical-align:top;border-top:2px solid black" | '''Dyson Sphere'''<br>[[File:Evt Dyson Sphere.png|195px]]
| style="width:1%" | [[File:Dyson Sphere Frame.jpg|100px]]
+
| style="border-top:2px solid black" | '''Site'''
| '''Frame'''
+
| style="border-top:2px solid black" | None
 +
| style="border-top:2px solid black" | {{icon|energy}} {{red|-5}}  
 +
| style="border-top:2px solid black" | {{icon|time}} {{Hover box|1 800 days|5 years}}<br>[[File:ap master builders.png|Master Builders|21px]] {{Hover box|1 200 days|3.33 years}}
 +
| style="border-top:2px solid black" | {{icon|influence}} {{red|300}} <br>{{icon|alloys}} {{red|5&#8239;000}}
 +
| rowspan=6 style="border-top:2px solid black" |
 +
* Can only be constructed around regular stars
 +
* Cannot be built if there are habitable planets, anomalies or stations present
 +
* Upon completion all rocky planets and moons in the system turn into frozen or cold barren worlds
 +
| rowspan=6 style="border-top:2px solid black" | [[File:ap galactic wonders.png|24px]]
 +
| rowspan=6 style="border-top:2px solid black" | {{icon|utp}}
 +
|-
 +
| '''Stage I (Frame)'''
 
| None
 
| None
 
| None
 
| None
| {{Hover box|10 years|3 600}} {{icon|time}}
+
| {{icon|time}} {{Hover box|3 600 days|10 years}}<br>[[File:ap master builders.png|Master Builders|21px]] {{Hover box|2 400 days|6.66 years}}
| {{red|50 000|back}} {{icon|minerals}}
+
| {{icon|alloys}} {{red|10&#8239;000}}
|- id="Partial (25%)"
+
|-  
| style="width:1%" | [[File:Dyson Sphere Partial (25%).jpg|100px]]
+
| '''Stage II (Partial 25%)'''
| '''Partial (25%)'''
+
| {{icon|energy}} {{green|+1000}} Energy
| {{green|+250|back}} {{icon|energy}}
 
 
| None
 
| None
| {{Hover box|10 years|3 600}} {{icon|time}}
+
| {{icon|time}} {{Hover box|3 600 days|10 years}}<br>[[File:ap master builders.png|Master Builders|21px]] {{Hover box|2 400 days|6.66 years}}
| {{red|50 000|back}} {{icon|minerals}}
+
| {{icon|alloys}} {{red|10&#8239;000}}
|- id="Partial (50%)"
+
|-  
| style="width:1%" | [[File:Dyson Sphere Partial (50%).jpg|100px]]
+
| '''Stage III (Partial 50%)'''
| '''Partial (50%)'''
+
| {{icon|energy}} {{green|+2000}} Energy
| {{green|+500|back}} {{icon|energy}}
 
 
| None
 
| None
| {{Hover box|10 years|3 600}} {{icon|time}}
+
| {{icon|time}} {{Hover box|3 600 days|10 years}}<br>[[File:ap master builders.png|Master Builders|21px]] {{Hover box|2 400 days|6.66 years}}
| {{red|50 000|back}} {{icon|minerals}}
+
| {{icon|alloys}} {{red|10&#8239;000}}
|- id="Partial (75%)"
+
|-  
| style="width:1%" | [[File:Dyson Sphere Partial (75%).jpg|100px]]
+
| '''Stage IV (Partial 75%)'''
| '''Partial (75%)'''
+
| {{icon|energy}} {{green|+3000}} Energy
| {{green|+750|back}} {{icon|energy}}
 
 
| None
 
| None
| {{Hover box|10 years|3 600}} {{icon|time}}
+
| {{icon|time}} {{Hover box|3 600 days|10 years}}<br>[[File:ap master builders.png|Master Builders|21px]] {{Hover box|2 400 days|6.66 years}}
| {{red|50 000|back}} {{icon|minerals}}
+
| {{icon|alloys}} {{red|10&#8239;000}}
|- id="Dyson Sphere"
+
|-  
| style="width:1%" | [[File:Dyson Sphere.jpg|100px]]
+
| '''Stage V (Completed)'''
| '''Dyson Sphere'''
+
| {{icon|energy}} {{green|+4000}} Energy
| {{green|+1000|back}} {{icon|energy}}
 
 
| None
 
| None
| {{Hover box|10 years|3 600}} {{icon|time}}
+
| {{icon|time}} {{Hover box|3 600 days|10 years}}<br>[[File:ap master builders.png|Master Builders|21px]] {{Hover box|2 400 days|6.66 years}}
| {{red|50 000|back}} {{icon|minerals}}
+
| {{icon|alloys}} {{red|10&#8239;000}}
 +
|-
 +
| rowspan=4 style="vertical-align:top;border-top:2px solid black"| '''Science Nexus'''<br>[[File:Evt Science Nexus.png|195px]]
 +
| style="border-top:2px solid black" | '''Site'''
 +
| style="border-top:2px solid black" | None
 +
| style="border-top:2px solid black" | {{icon|energy}} {{red|-25}}
 +
| style="border-top:2px solid black" | {{icon|time}} {{Hover box|1 800|5 years}}<br>[[File:ap master builders.png|Master Builders|21px]] {{Hover box|1 200 days|3.33 years}}
 +
| style="border-top:2px solid black" | {{icon|influence}} {{red|300}} <br> {{icon|alloys}} {{red|5&#8239;000}}
 +
| rowspan=4 style="border-top:2px solid black" |
 +
* The final stage of a Science Nexus can be upgraded to produce {{green|50}} more {{iconify|Research}} through an event that has a 30% chance to trigger a short time after the Megastructure is finished
 +
| rowspan=4 style="border-top:2px solid black" |
 +
| rowspan=4 style="border-top:2px solid black" | {{icon|utp}}
 +
|-
 +
| '''Stage I (Hub)'''
 +
| {{icon|research}} {{green|+100}} Research<br>{{icon|research speed}} {{green|+5%}} Research Speed
 +
| {{icon|energy}} {{red|-50}}
 +
| {{icon|time}} {{Hover box|3 600|10 years}}<br>[[File:ap master builders.png|Master Builders|21px]] {{Hover box|2 400 days|6.66 years}}
 +
|  {{icon|alloys}} {{red|15&#8239;000}}
 +
|-
 +
| '''Stage II (Research Wings)'''
 +
| {{icon|research}} {{green|+200}} Research<br>{{icon|research speed}} {{green|+10%}} Research Speed
 +
| {{icon|energy}} {{red|-75}}
 +
| {{icon|time}} {{Hover box|3 600|10 years}}<br>[[File:ap master builders.png|Master Builders|21px]] {{Hover box|2 400 days|6.66 years}}
 +
|  {{icon|alloys}} {{red|15&#8239;000}}
 +
|-
 +
| '''Stage III (Completed)'''
 +
| {{icon|research}} {{green|+300}} Research<br>{{icon|research speed}} {{green|+15%}} Research Speed
 +
| {{icon|energy}} {{red|-100}}
 +
| {{icon|time}} {{Hover box|3 600|10 years}}<br>[[File:ap master builders.png|Master Builders|21px]] {{Hover box|2 400 days|6.66 years}}
 +
| {{icon|alloys}} {{red|15&#8239;000}}
 +
|-
 +
| rowspan=5 style="vertical-align:top;border-top:2px solid black"| '''Sentry Array'''<br>[[File:Evt Sentry Array.png|195px]]
 +
| style="border-top:2px solid black" | '''Site'''
 +
| style="border-top:2px solid black" | None
 +
| style="border-top:2px solid black" | {{icon|energy}} {{red|-20}}
 +
| style="border-top:2px solid black" | {{icon|time}} {{Hover box|1 800|5 years}}<br>[[File:ap master builders.png|Master Builders|21px]] {{Hover box|1 200 days|3.33 years}}
 +
| style="border-top:2px solid black" | {{icon|influence}} {{red|300}} <br> {{icon|alloys}} {{red|5&#8239;000}}
 +
| rowspan=5 style="border-top:2px solid black" |
 +
* Until finished the Sentry Array cannot see through nebulae
 +
| rowspan=5 style="border-top:2px solid black" |
 +
| rowspan=5 style="border-top:2px solid black" | {{icon|utp}}
 +
|-
 +
| '''Stage I (Sentry Hub)'''
 +
| {{icon|sensor range}} {{green|+20}} Hyperlane Scanner Range
 +
| {{icon|energy}} {{red|-40}}
 +
| {{icon|time}} {{Hover box|1 800|5 years}}<br>[[File:ap master builders.png|Master Builders|21px]] {{Hover box|1 200 days|3.33 years}}
 +
|  {{icon|alloys}} {{red|10&#8239;000}}
 +
|-
 +
| '''Stage II (Sentry Spire)'''
 +
| {{icon|sensor range}} {{green|+40}} Hyperlane Scanner Range
 +
| {{icon|energy}} {{red|-60}}
 +
| {{icon|time}} {{Hover box|1 800|5 years}}<br>[[File:ap master builders.png|Master Builders|21px]] {{Hover box|1 200 days|3.33 years}}
 +
|  {{icon|alloys}} {{red|10&#8239;000}}
 +
|-
 +
| '''Stage III (Sentry Aerials)'''
 +
| {{icon|sensor range}} {{green|+60}} Hyperlane Scanner Range
 +
| {{icon|energy}} {{red|-80}}
 +
| {{icon|time}} {{Hover box|1 800|5 years}}<br>[[File:ap master builders.png|Master Builders|21px]] {{Hover box|1 200 days|3.33 years}}
 +
|  {{icon|alloys}} {{red|10&#8239;000}}
 +
|-
 +
| '''Stage IV (Completed)'''
 +
| {{icon|sensor range}} {{green|Entire Galaxy}} Hyperlane Scanner Range
 +
| {{icon|energy}} {{red|-100}}
 +
| {{icon|time}} {{Hover box|1 800|5 years}}<br>[[File:ap master builders.png|Master Builders|21px]] {{Hover box|1 200 days|3.33 years}}
 +
| {{icon|alloys}} {{red|10&#8239;000}}
 +
|-
 +
| rowspan=5 style="vertical-align:top;border-top:2px solid black"| '''Matter Decompressor'''<br>[[File:Evt Matter Decompressor.png|195px]]
 +
| style="border-top:2px solid black" | '''Site'''
 +
| style="border-top:2px solid black" | None
 +
| style="border-top:2px solid black" | {{icon|energy}} {{red|-5}}
 +
| style="border-top:2px solid black" | {{icon|time}} {{Hover box|1 800|5 years}}
 +
| style="border-top:2px solid black" | {{icon|influence}} {{red|300}} <br> {{icon|alloys}} {{red|5&#8239;000}}
 +
| rowspan=5 style="border-top:2px solid black" |
 +
* Can only be constructed around black holes
 +
| rowspan=5 style="border-top:2px solid black" | [[File:ap galactic wonders.png|24px]]
 +
| rowspan=5 style="border-top:2px solid black" | {{icon|mgc}}
 +
|-
 +
| '''Stage I (Anchor)'''
 +
| {{icon|minerals}} {{green|+500}} Minerals
 +
| {{icon|energy}} {{red|-25}}
 +
| {{icon|time}} {{Hover box|3 600|10 years}}
 +
| {{icon|alloys}} {{red|12 500}}
 +
|-
 +
| '''Stage II (Lensing)'''
 +
| {{icon|minerals}} {{green|+1000}} Minerals
 +
| {{icon|energy}} {{red|-50}}
 +
| {{icon|time}} {{Hover box|3 600|10 years}}
 +
| {{icon|alloys}} {{red|12 500}}
 +
|-
 +
| '''Stage III (Boring)'''
 +
| {{icon|minerals}} {{green|+1500}} Minerals
 +
| {{icon|energy}} {{red|-75}}
 +
| {{icon|time}} {{Hover box|3 600|10 years}}
 +
| {{icon|alloys}} {{red|12 500}}
 +
|-
 +
| '''Stage IV (Completed)'''
 +
| {{icon|minerals}} {{green|+2000}} Minerals
 +
| {{icon|energy}} {{red|-100}}
 +
| {{icon|time}} {{Hover box|3 600|10 years}}
 +
| {{icon|alloys}} {{red|12 500}}
 +
|-
 +
| rowspan=5 style="vertical-align:top;border-top:2px solid black"| '''Mega Art Installation'''<br>[[File:Evt Mega Art Installation.png|195px]]
 +
| style="border-top:2px solid black" | '''Site'''
 +
| style="border-top:2px solid black" | None
 +
| style="border-top:2px solid black" | {{icon|energy}} {{red|-5}}
 +
| style="border-top:2px solid black" | {{icon|time}} {{Hover box|1 800|5 years}}
 +
| style="border-top:2px solid black" | {{icon|influence}} {{red|300}} <br>{{icon|alloys}} {{red|5&#8239;000}}
 +
| rowspan=5 style="border-top:2px solid black" |
 +
* The final stage requires the {{iconify|Ancient Relics}} DLC and is not available if the empire is {{iconify|Xenophobe}} or {{iconify|Fanatic Xenophobe}}
 +
| rowspan=5 style="border-top:2px solid black" |
 +
| rowspan=5 style="border-top:2px solid black" | {{icon|mgc}}
 +
|-
 +
| '''Stage I (Nascency)'''
 +
| {{icon|unity}} {{green|+100}} Unity<br>{{icon|amenities}} {{green|+5%}} Amenities
 +
| {{icon|energy}} {{red|-10}}
 +
| {{icon|time}} {{Hover box|3 600|10 years}}
 +
| {{icon|alloys}} {{red|15&#8239;000}}
 +
|-
 +
| '''Stage II (Maturity)'''
 +
| {{icon|unity}} {{green|+200}} Unity<br>{{icon|amenities}} {{green|+10%}} Amenities
 +
| {{icon|energy}} {{red|-20}}
 +
| {{icon|time}} {{Hover box|3 600|10 years}}
 +
| {{icon|alloys}} {{red|15&#8239;000}}
 +
|-
 +
| '''Stage III (Completed)'''
 +
| {{icon|unity}} {{green|+300}} Unity<br>{{icon|amenities}} {{green|+15%}} Amenities
 +
| {{icon|energy}} {{red|-30}}
 +
| {{icon|time}} {{Hover box|3 600|10 years}}
 +
| {{icon|alloys}} {{red|15&#8239;000}}
 +
|-
 +
| '''Stage IV (Perfection)'''
 +
| {{icon|unity}} {{green|+400}} Unity<br>{{icon|amenities}} {{green|+20%}} Amenities
 +
| {{icon|energy}} {{red|-30}}
 +
| {{icon|time}} {{Hover box|3 600|10 years}}
 +
| {{icon|minor artifacts}} {{red|100}}
 +
|-
 +
| rowspan=4 style="vertical-align:top;border-top:2px solid black"| '''Strategic Coordination Center'''<br>[[File:Evt Strategic Coordination Center.png|195px]]
 +
| style="border-top:2px solid black" | '''Site'''
 +
| style="border-top:2px solid black" | None
 +
| style="border-top:2px solid black" | {{icon|energy}} {{red|-5}}
 +
| style="border-top:2px solid black" | {{icon|time}} {{Hover box|1 800|5 years}}
 +
| style="border-top:2px solid black" | {{icon|influence}} {{red|300}} <br> {{icon|alloys}} {{red|5&#8239;000}}
 +
| rowspan=4 style="border-top:2px solid black" |
 +
| rowspan=4 style="border-top:2px solid black" |
 +
| rowspan=4 style="border-top:2px solid black" | {{icon|mgc}}
 +
|-
 +
| '''Stage I (Hull)'''
 +
| {{icon|naval capacity}} {{green|+50}} Naval Capacity<br>{{icon|starbase}} {{green|+2}} Starbase Capacity<br>{{icon|starbase}} {{green|+4}} Defense Platforms<br>{{icon|sublight speed}} {{green|+5%}} Sublight Speed
 +
| {{icon|energy}} {{red|-25}}
 +
| {{icon|time}} {{Hover box|3 600|10 years}}
 +
| {{icon|alloys}} {{red|15&#8239;000}}
 +
|-
 +
| '''Stage II (Comms)'''
 +
| {{icon|naval capacity}} {{green|+100}} Naval Capacity<br>{{icon|starbase}} {{green|+4}} Starbase Capacity<br>{{icon|starbase}} {{green|+8}} Defense Platforms<br>{{icon|sublight speed}} {{green|+10%}} Sublight Speed
 +
| {{icon|energy}} {{red|-50}}
 +
| {{icon|time}} {{Hover box|3 600|10 years}}
 +
| {{icon|alloys}} {{red|15&#8239;000}}
 +
|-
 +
| '''Stage III (Completed)'''
 +
| {{icon|naval capacity}} {{green|+150}} Naval Capacity<br>{{icon|starbase}} {{green|+6}} Starbase Capacity<br>{{icon|starbase}} {{green|+12}} Defense Platforms<br>{{icon|sublight speed}} {{green|+15%}} Sublight Speed
 +
| {{icon|energy}} {{red|-75}}
 +
| {{icon|time}} {{Hover box|3 600|10 years}}
 +
| {{icon|alloys}} {{red|15&#8239;000}}
 
|-
 
|-
 +
| rowspan=5 style="vertical-align:top;border-top:2px solid black"| '''Interstellar Assembly'''<br>[[File:Evt Interstellar Assembly.png|195px]]
 +
| style="border-top:2px solid black" | '''Site'''
 +
| style="border-top:2px solid black" | None
 +
| style="border-top:2px solid black" | {{icon|energy}} {{red|-5}}
 +
| style="border-top:2px solid black" | {{icon|time}} {{Hover box|1 800|5 years}}
 +
| style="border-top:2px solid black" | {{icon|influence}} {{red|300}} <br>{{icon|alloys}} {{red|5&#8239;000}}
 +
| rowspan=5 style="border-top:2px solid black" |
 +
| rowspan=5 style="border-top:2px solid black" |
 +
| rowspan=5 style="border-top:2px solid black" | {{icon|mgc}}
 +
|-
 +
| '''Stage I (Locus)'''
 +
| {{icon|opinion}} {{green|+10}} Other Empires' Opinion<br>{{icon|migration attraction}} {{green|+25%}} Immigration Pull
 +
| {{icon|energy}} {{red|-10}}
 +
| {{icon|time}} {{Hover box|1 800|5 years}}
 +
| {{icon|alloys}} {{red|10&#8239;000}}
 +
|-
 +
| '''Stage II (Consul Ring)'''
 +
| {{icon|opinion}} {{green|+20}} Other Empires' Opinion<br>{{icon|migration attraction}} {{green|+50%}} Immigration Pull
 +
| {{icon|energy}} {{red|-20}}
 +
| {{icon|time}} {{Hover box|1 800|5 years}}
 +
| {{icon|alloys}} {{red|10&#8239;000}}
 +
|-
 +
| '''Stage III (Forum Modules)'''
 +
| {{icon|opinion}} {{green|+30}} Other Empires' Opinion<br>{{icon|migration attraction}} {{green|+75%}} Immigration Pull
 +
| {{icon|energy}} {{red|-30}}
 +
| {{icon|time}} {{Hover box|1 800|5 years}}
 +
| {{icon|alloys}} {{red|10&#8239;000}}
 +
|-
 +
| '''Stage IV (Completed)'''
 +
| {{icon|opinion}} {{green|+50}} Other Empires' Opinion<br>{{icon|migration attraction}} {{green|+100%}} Immigration Pull
 +
| {{icon|energy}} {{red|-40}}
 +
| {{icon|time}} {{Hover box|1 800|5 years}}
 +
| {{icon|alloys}} {{red|10&#8239;000}}
 
|}
 
|}
==== Events ====
 
During the construction of the framework of the sphere, neighboring empires may tell you their astonishment about your progress in constructing the sphere and request for your permission to allow a group of engineers to study the technology. Accepting the request may result in opinion improvement by {{green|40}} which decreases by {{red|-2}} yearly. You will also be awarded 250 points of engineering research. There is no clue that whether the empire will be able to construct Dyson Spheres after the event.
 
 
Once you finish the framework of the Sphere, there is a chance where a neighboring empire will approach you revealing the importance of that star in said empires culture and asking for either a formal apology or a donation of credits. Refusing adds "The Blind Wanderer" to their opinion screen which reduces their opinion of you by {{red|-40}} which decreases by {{green|+2}} yearly.
 
 
==== Strategy ====
 
The Dyson Sphere offers a massive energy income at no cost for [[Unity]] or [[Research]] from population/colonized planets. Habitats may also be built in systems with a Dyson sphere, but not other megastructures.
 
 
=== Science Nexus ===
 
{{SVersion|1.9}}
 
[[File:Evt Science Nexus.png|450px|right|thumb|Completed Science Nexus]]
 
 
The Science Nexus takes close to {{red|25}} years to complete and costs a grand total of {{red|300}} {{iconify|influence}} and {{red|100 000}} {{iconify|minerals}} and provides a spectacular {{green|+225}} {{icon|research}} research bonus across all fields.
 
 
==== Strategy ====
 
The Science Nexus provides a huge bonus to Science without any penalty from having another colonized planet. The initial site cost 10,000 minerals, and the three stages after cost 30,000 minerals each while providing {{green|75}}/{{green|150}}/{{green|225}} to all science. Even the first stage is equivalent of a research-focused planet.
 
 
==== Events ====
 
One of these events can take place while owning a Science Nexus that is completed or has its research wings built.
 
* An incident at the physics department made everyone black out for 15 minutes and the scientist leader handling it disappeared. One year later the leader will mysteriously reappear as if nothing happened and gain the {{iconify|spark of genius}} and {{iconify|maniacal}} traits.
 
* A neural bank using brain power to improve research speed is invented. Only one of your scientist leaders will volunteer and allowing it will remove him or her from your pool but add a permanent +25 {{icon|research}} research production to the science nexus.
 
* Fountain of Youth: You might be given the option to recruit a prominent expert in the field of life-extension for 1000 {{iconify|energy credits}} or focus on research on organic supercomputers for free. Recruiting the scientist will lead the organic engineering chief scientist to accuse him of being a fraud and demand an investigation that will cost 500 {{iconify|energy credits}}. If the demand is refused two months later it will be revealed that her suspicions were right as the "prominent expert" disappears and you will gain nothing. Starting an investigation will give you the option to either apprehend him and gain a small amount of {{iconify|society}} research or market his fake research and gain the Fountain of Gold modifier for a year, giving you +200 monthly {{iconify|energy credits}} for a year. Focusing on organic supercomputers instead it will lead to the aforementioned neural vault event (which can happen individually as well).
 
  
=== Sentry Array ===
+
=== Ruined megastructures ===
{{SVersion|1.9}}
+
[[File:ruined dyson sphere.png|thumb|310px|Ruined Dyson Sphere]]
[[File:Evt Sentry Array.png|450px|right|thumb|Completed Sentry Array]]
+
A ruined version of a multi-stage megastructure can be found while exploring the galaxy, with the largest galaxies having a chance to spawn two or even three systems with ruined megastructures. Repairing them only requires the {{iconify|mega-engineering|21px}} technology and no ascension perks. If not yet researched, running into a ruined megastructure also grants a {{hover|x20 weight|better chance}} for {{iconify|mega-engineering|21px}} to appear as a researchable technology.
  
The easiest Galactic Wonder to construct, a Sentry Array must be built around a star or black hole and takes {{red|25}} years to complete and costs a grand total of {{red|300}} {{iconify|influence}} and {{red|90 000}} {{iconify|minerals}}.
+
While they upgrade from their broken to a fully functional state in one step, they do not count for any achievements. However, they do not count against any build limit for that particular megastructure either. Another megastructure may also be constructed in the same system as a ruined or restored one.
 
+
{| class="mildtable plainlist"
==== Strategy ====
+
! Ruined Megastructure !! {{iconify|Time}} !! {{iconify|Alloys}}
The completely finished Sentry Array will give you vision over the entire galaxy. This makes it an important military and strategic asset, as complete intelligence of every pop and fleet in the galaxy can give considerable strategic information. On lower levels it will still provide at least considerable vision, quickly eliminating any "blind spots" in the sensor coverage of the player or their federation.
 
 
 
Provided you do not lose the system hosting your Sentry Array, it makes the Planetary Signal Booster technology useless, allowing you to focus on other late-game repeatable technologies. Due to their shared importance the capital system is usually an ideal location for the Sentry Array. On tiny galaxies even a halfway built Sentry Array will give complete coverage.
 
 
 
=== Ruined Galactic Wonders ===
 
[[File:ruined dyson sphere.png|thumb|350px|Ruined Dyson Sphere]]
 
{{SVersion|1.9}}
 
One of each Galactic Wonder can be found ruined in the galaxy, and the largest galaxies can spawn two or even all three ruined Galactic Wonders. Repairing them only requires {{iconify|mega-engineering|21px}} technology and no Ascension Perk, while also granting a better chance (x20 weight) to draw {{iconify|mega-engineering|21px}}. While they upgrade from their broken to a fully functional state in one step, they do not count for any achievements and generally do not trigger any of the special quests associatied with them. However as they do not count for the achievements they also do not count against any limit for that particular megastructure.
 
{| class="wikitable sortable plainlist"
 
! Ruined Megastructure !! {{iconify|Time}} !! {{iconify|Minerals}}
 
 
|- id="Dyson Sphere"
 
|- id="Dyson Sphere"
| Dyson Sphere || 7200 || 50000
+
| Dyson Sphere || {{hover|20 years|7200}} || 20000
 
|- id="Science Nexus"
 
|- id="Science Nexus"
| Science Nexus || 3600 || 30000
+
| Science Nexus || {{hover|13 years|4800}} || 15000
 
|- id="Sentry Array"
 
|- id="Sentry Array"
| Sentry Array || 3600 || 30000
+
| Sentry Array || {{hover| 13 years| 4800}} || 15000
 +
|- id="Matter Decompressor"
 +
| Matter Decompressor || {{hover| 13 years| 4800}} || 20000
 +
|- id="Mega Art Installation"
 +
| Mega Art Installation || {{hover| 13 years| 4800}} || 20000
 +
|- id="Strategic Coordination Center"
 +
| Strategic Coordination Center || {{hover| 13 years| 4800}} || 15000
 +
|- id="Interstellar Assembly"
 +
| Interstellar Assembly || {{hover| 10 years| 3600}} || 15000
 
|}
 
|}
  
 +
=== Conquerable Ringworlds ===
 +
Up to 7 ringworlds can spawn naturally in a game in various states. Damaged segments can be repaired with the {{iconify|mega-engineering|21px}} tech for the same cost as finishing a new segment.
 +
* 1 in the Sanctuary system. All 4 habitable sections are intact and each contains one pre-FTL civilization, none advanced beyond Steam Age. The system was abandoned by an Enigmatic Observer Fallen Empire but contains automated defense platforms totaling over 50k [[Space_warfare#Combat|fleet power]].
 +
* 1 in the Cybrex Alpha system. It requires completing the Cybrex precursor event chain. The ringworld is completely ruined and requires repairs on each section.
 +
* 1 in the Cybrex Beta system. It will only be revealed if [[the Contingency]] sterilizes 20% of the galaxy. A short time after the Contingency is defeated, the Cybrex will leave the galaxy, leaving the ringworld free for the taking.
 +
* 1 in a random empty system if {{iconify|Utopia}} DLC is activated. It is completely ruined and each section requires repairing. If the {{iconify|Distant Stars}} DLC is activated as well the system can contain an unique anomaly.
 +
* 3 in the systems of the Ancient Caretakers if {{iconify|Synthetic Dawn}} DLC is activated. The ringworld in the home system has 3 intact and one ruined section while the other two ringworlds are completely ruined and require each section to be repaired separately.
  
 
{{ConceptsNavbox}}
 
{{ConceptsNavbox}}
 
[[Category:Game concepts]]
 
[[Category:Game concepts]]
 
[[Category:Megastructures]]
 
[[Category:Megastructures]]

Latest revision as of 21:44, 18 October 2019

Version

Outliner top.png
This article may contain outdated information that is inaccurate for the current version of the game. It was last updated for 2.3.

This article is for the PC version of Stellaris only.
Humanoid Empire constructing a Dyson Sphere

Megastructures are colossal constructions. Expensive and time-consuming to build or repair, these remarkable feats of engineering are nonetheless important wonders that provide large bonuses, demonstrating the technological and economic primacy of the builders' empire. All of them require unlocking certain technologies to be built.

Construction[edit]

There are three types of megastructures: gateways, habitable projects and galactic wonders. Systems can only host one galactic wonder. Habitable megastructures (habitats and ringworlds) can be colonized but will be irreparably destroyed if a crisis overruns them. Galactic wonders provide massive bonuses and cannot be destroyed by any crisis, but are limited to one per empire. All megastructures have a different textures depending on the empire that built them.

It is only possible to build, upgrade, or restore one megastructure at a time, except in the case of habitats and gateways. The limit can be increased by one with the Master Builders perk, and one more with the Architectural Renaissance Ambition edict.

A construction ship is required to build the first stage of any megastructure. If the megastructure has multiple stages, the following stages do not require the construction ship.

Each megastructure is unlocked by researching the technology of the same name. An empire that conquers a system with a megastructure can use it, but if the construction was partial it will not be able to continue its construction without the required technology. Damaged megastructures found through exploration, however, can be reconstructed by unlocking the Tech mega engineering.png Mega Engineering technology.

Bonuses[edit]

A few bonuses affect megastructure construction speed. These are highly desirable considering the great time requirements of such projects:

  • Master Builders Master Builders ascension perk increases the build speed by +50%
  • Menu icon policies and edicts.png Living Metal Mega-Construction edict increases the build speed by +50%
  • Menu icon policies and edicts.png Architectural Renaissance unity ambition also increases the build speed by +50%

Gateways[edit]

Real scale of a Gateway

While exploring the galaxy, empires can find abandoned gateways that were once part of a massive, galaxy-spanning network. Reverse-engineered from encountered abandoned gateways, these megastructures require the Tech gateway activation.png Gateway Activation technology and can be used to travel directly to any other active gateway in the galaxy. Reactivation of gateway takes 2 years and costs 6000 Energy Credits.png energy and 2500 Alloys.png alloys. The Tech gateway activation.png Gateway Activation technology can appear as a research option as soon as a Gateway has been discovered and Tech hyper drive 3.png Hyperspace Slipstreams technology has been researched but the chance is very low. Owning a system with an inactive Gateway increases the chance for the tech to appear by 4 times.

When the first gateway in the galaxy is reactivated, another random gateway will also be re-activated along with it. As opposed to wormholes, both gateways must be owned by the same empire or two empires with open borders in order to be able to travel through them. Systems with gateways count as bordering for the purposes of diplomacy, so every opened gate increases diplomatic tension between all active gate-owners. Claims cannot be extended through gateways. Additionally, gateways are able to greatly enhance and simplify trade infrastructure.

Eventually, empires can build their own gateways by researching the Tech gateway construction.png Gateway Construction technology. Notice, that this tech requires having some civilization with an access to pre-existing gateways, so if gateways were disabled during galaxy creation it is impossible to build any new. Each system can have only one gateway, but black hole systems with an L-Gate can also have a regular gateway constructed. Gateways can be built in systems in which there is already a megastructure. The construction site is built in only 3 years and costs 100 Influence.png influence and 2500 Alloys.png alloys. Upgrading it to a gateway takes 5 years and costs 6000 Energy Credits.png energy and 2500 Alloys.png alloys.

Habitats[edit]

Mammalian habitat.

Artificial planets in all but name, habitats have a Planet Size.png planet size of 6 to work coupled with 70% Mod habitability.png habitability for all species. Its appearance is dependent on the builders' empire appearance. The constructed habitat still requires colonization.

Habitats have a unique set of Districts distinct from normal planetary ones. Up to 3 Districts are shared among all Habitats, with a fourth one being available if the Habitat is built above a planet with a resource deposit. Generator Districts are available for energy deposits, Mining Districts are available for mineral and alloy deposits (which are added as a rare feature to the habitat), and research districts become available for any celestial bodies that provide research boosts. The districts are only capped by the maximum amount of districts for that station (6 or 8, see below).

The project takes 5 years to complete and costs a total of 200 Influence.png influence and 3000 Alloys.png alloys. Unlike other megastructures habitats do not require a construction site and are finished in one go by the construction ship.

Habitats require the Tech habitat.png Orbital Habitats technology to be built. The Voidborne Voidborne Ascension Perk increases their Mod habitability.png Habitability to 90% and Mod planet max districts add.png District Cap to 8. They cannot be built on moons or planets with an anomaly.

If a habitat is destroyed by a crisis or World Cracker it will never be possible to build another habitat on the same spot, or even a mining/research station, so any Strategic.png strategic resources on the planet are permanently lost.

Multi-stage megastructures[edit]

Multi-stage megastructures are constructed in multiple stages. Almost all of them can only be constructed once. They start with a construction site that provides no benefit, however each subsequent construction phase will bring increasing bonuses, culminating with the end of the megastructure construction. Habitats and gateways can be built in the same system as multi-stage megastructures.

These Megastructures can only be built once per empire and require the technology of the same name before they can be constructed. However their bonuses are massive and they cannot be destroyed, only captured.

Multi-stage megastructures conquered from other empires do not count against the build limit, nor do ruined ones that are found and repaired.

Megastructure Production Upkeep Time Cost Notes AP DLC
Ring World
Evt Ringworld.png
Site None Energy Credits.png -5 Time 5 years
Master Builders 3.33 years
Influence.png 300
Alloys.png 5 000
  • Cannot be built around Black Holes or in systems with multiple stars
  • Cannot be built if there are habitable planets, anomalies or stations present
  • Unlike other multi-stage Megastructures an empire can build more Ring Worlds
  • All segments feature +100% Mod habitability.png Habitability for each species, can build up to 5 unique Districts and have their own unique Designations
  • If they are built in the L-Cluster the uninhabitable segments will have Nanites.png Nanites deposits
  • Upon completion of the frame all planets are removed from the system
  • Multiple segments can be built at the same time if you have the capacity to work on more than one megastructure simultaneously
Ap galactic wonders.png Utopia.png
Stage I (Frame) None None Time 13.3 years
Master Builders 8.88 years
Alloys.png 10 000
Stage II (1 Segment) Planet ringworld.png +1 Habitable Segment None Time 10 years
Master Builders 6.66 years
Alloys.png 10 000
Stage III (2 Segments) Planet ringworld.png +2 Habitable Segments None Time 10 years
Master Builders 6.66 years
Alloys.png 10 000
Stage IV (3 Segments) Planet ringworld.png +3 Habitable Segments None Time 10 years
Master Builders 6.66 years
Alloys.png 10 000
Stage V (Complete) Planet ringworld.png +4 Habitable Segments None Time 10 years
Master Builders 6.66 years
Alloys.png 10 000
Dyson Sphere
Evt Dyson Sphere.png
Site None Energy Credits.png -5 Time 5 years
Master Builders 3.33 years
Influence.png 300
Alloys.png 5 000
  • Can only be constructed around regular stars
  • Cannot be built if there are habitable planets, anomalies or stations present
  • Upon completion all rocky planets and moons in the system turn into frozen or cold barren worlds
Ap galactic wonders.png Utopia.png
Stage I (Frame) None None Time 10 years
Master Builders 6.66 years
Alloys.png 10 000
Stage II (Partial 25%) Energy Credits.png +1000 Energy None Time 10 years
Master Builders 6.66 years
Alloys.png 10 000
Stage III (Partial 50%) Energy Credits.png +2000 Energy None Time 10 years
Master Builders 6.66 years
Alloys.png 10 000
Stage IV (Partial 75%) Energy Credits.png +3000 Energy None Time 10 years
Master Builders 6.66 years
Alloys.png 10 000
Stage V (Completed) Energy Credits.png +4000 Energy None Time 10 years
Master Builders 6.66 years
Alloys.png 10 000
Science Nexus
Evt Science Nexus.png
Site None Energy Credits.png -25 Time 5 years
Master Builders 3.33 years
Influence.png 300
Alloys.png 5 000
  • The final stage of a Science Nexus can be upgraded to produce 50 more Research.png Research through an event that has a 30% chance to trigger a short time after the Megastructure is finished
Utopia.png
Stage I (Hub) Research.png +100 Research
Mod country all tech research speed.png +5% Research Speed
Energy Credits.png -50 Time 10 years
Master Builders 6.66 years
Alloys.png 15 000
Stage II (Research Wings) Research.png +200 Research
Mod country all tech research speed.png +10% Research Speed
Energy Credits.png -75 Time 10 years
Master Builders 6.66 years
Alloys.png 15 000
Stage III (Completed) Research.png +300 Research
Mod country all tech research speed.png +15% Research Speed
Energy Credits.png -100 Time 10 years
Master Builders 6.66 years
Alloys.png 15 000
Sentry Array
Evt Sentry Array.png
Site None Energy Credits.png -20 Time 5 years
Master Builders 3.33 years
Influence.png 300
Alloys.png 5 000
  • Until finished the Sentry Array cannot see through nebulae
Utopia.png
Stage I (Sentry Hub) Mod planet sensor range mult.png +20 Hyperlane Scanner Range Energy Credits.png -40 Time 5 years
Master Builders 3.33 years
Alloys.png 10 000
Stage II (Sentry Spire) Mod planet sensor range mult.png +40 Hyperlane Scanner Range Energy Credits.png -60 Time 5 years
Master Builders 3.33 years
Alloys.png 10 000
Stage III (Sentry Aerials) Mod planet sensor range mult.png +60 Hyperlane Scanner Range Energy Credits.png -80 Time 5 years
Master Builders 3.33 years
Alloys.png 10 000
Stage IV (Completed) Mod planet sensor range mult.png Entire Galaxy Hyperlane Scanner Range Energy Credits.png -100 Time 5 years
Master Builders 3.33 years
Alloys.png 10 000
Matter Decompressor
Evt Matter Decompressor.png
Site None Energy Credits.png -5 Time 5 years Influence.png 300
Alloys.png 5 000
  • Can only be constructed around black holes
Ap galactic wonders.png MegaCorp.png
Stage I (Anchor) Minerals.png +500 Minerals Energy Credits.png -25 Time 10 years Alloys.png 12 500
Stage II (Lensing) Minerals.png +1000 Minerals Energy Credits.png -50 Time 10 years Alloys.png 12 500
Stage III (Boring) Minerals.png +1500 Minerals Energy Credits.png -75 Time 10 years Alloys.png 12 500
Stage IV (Completed) Minerals.png +2000 Minerals Energy Credits.png -100 Time 10 years Alloys.png 12 500
Mega Art Installation
Evt Mega Art Installation.png
Site None Energy Credits.png -5 Time 5 years Influence.png 300
Alloys.png 5 000
  • The final stage requires the Ancient Relics.png Ancient Relics DLC and is not available if the empire is Xenophobe.png Xenophobe or Fanatic Xenophobe.png Fanatic Xenophobe
MegaCorp.png
Stage I (Nascency) Unity.png +100 Unity
Amenities.png +5% Amenities
Energy Credits.png -10 Time 10 years Alloys.png 15 000
Stage II (Maturity) Unity.png +200 Unity
Amenities.png +10% Amenities
Energy Credits.png -20 Time 10 years Alloys.png 15 000
Stage III (Completed) Unity.png +300 Unity
Amenities.png +15% Amenities
Energy Credits.png -30 Time 10 years Alloys.png 15 000
Stage IV (Perfection) Unity.png +400 Unity
Amenities.png +20% Amenities
Energy Credits.png -30 Time 10 years Minor artifacts large.png 100
Strategic Coordination Center
Evt Strategic Coordination Center.png
Site None Energy Credits.png -5 Time 5 years Influence.png 300
Alloys.png 5 000
MegaCorp.png
Stage I (Hull) Mod fleet size add.png +50 Naval Capacity
Spaceport 1.png +2 Starbase Capacity
Spaceport 1.png +4 Defense Platforms
Mod ship speed mult.png +5% Sublight Speed
Energy Credits.png -25 Time 10 years Alloys.png 15 000
Stage II (Comms) Mod fleet size add.png +100 Naval Capacity
Spaceport 1.png +4 Starbase Capacity
Spaceport 1.png +8 Defense Platforms
Mod ship speed mult.png +10% Sublight Speed
Energy Credits.png -50 Time 10 years Alloys.png 15 000
Stage III (Completed) Mod fleet size add.png +150 Naval Capacity
Spaceport 1.png +6 Starbase Capacity
Spaceport 1.png +12 Defense Platforms
Mod ship speed mult.png +15% Sublight Speed
Energy Credits.png -75 Time 10 years Alloys.png 15 000
Interstellar Assembly
Evt Interstellar Assembly.png
Site None Energy Credits.png -5 Time 5 years Influence.png 300
Alloys.png 5 000
MegaCorp.png
Stage I (Locus) Diplomacy opinion.png +10 Other Empires' Opinion
Mod planet migration all pull.png +25% Immigration Pull
Energy Credits.png -10 Time 5 years Alloys.png 10 000
Stage II (Consul Ring) Diplomacy opinion.png +20 Other Empires' Opinion
Mod planet migration all pull.png +50% Immigration Pull
Energy Credits.png -20 Time 5 years Alloys.png 10 000
Stage III (Forum Modules) Diplomacy opinion.png +30 Other Empires' Opinion
Mod planet migration all pull.png +75% Immigration Pull
Energy Credits.png -30 Time 5 years Alloys.png 10 000
Stage IV (Completed) Diplomacy opinion.png +50 Other Empires' Opinion
Mod planet migration all pull.png +100% Immigration Pull
Energy Credits.png -40 Time 5 years Alloys.png 10 000

Ruined megastructures[edit]

Ruined Dyson Sphere

A ruined version of a multi-stage megastructure can be found while exploring the galaxy, with the largest galaxies having a chance to spawn two or even three systems with ruined megastructures. Repairing them only requires the Tech mega engineering.png mega-engineering technology and no ascension perks. If not yet researched, running into a ruined megastructure also grants a better chance for Tech mega engineering.png mega-engineering to appear as a researchable technology.

While they upgrade from their broken to a fully functional state in one step, they do not count for any achievements. However, they do not count against any build limit for that particular megastructure either. Another megastructure may also be constructed in the same system as a ruined or restored one.

Ruined Megastructure Time Time Alloys.png Alloys
Dyson Sphere 7200 20000
Science Nexus 4800 15000
Sentry Array 4800 15000
Matter Decompressor 4800 20000
Mega Art Installation 4800 20000
Strategic Coordination Center 4800 15000
Interstellar Assembly 3600 15000

Conquerable Ringworlds[edit]

Up to 7 ringworlds can spawn naturally in a game in various states. Damaged segments can be repaired with the Tech mega engineering.png mega-engineering tech for the same cost as finishing a new segment.

  • 1 in the Sanctuary system. All 4 habitable sections are intact and each contains one pre-FTL civilization, none advanced beyond Steam Age. The system was abandoned by an Enigmatic Observer Fallen Empire but contains automated defense platforms totaling over 50k fleet power.
  • 1 in the Cybrex Alpha system. It requires completing the Cybrex precursor event chain. The ringworld is completely ruined and requires repairs on each section.
  • 1 in the Cybrex Beta system. It will only be revealed if the Contingency sterilizes 20% of the galaxy. A short time after the Contingency is defeated, the Cybrex will leave the galaxy, leaving the ringworld free for the taking.
  • 1 in a random empty system if Utopia.png Utopia DLC is activated. It is completely ruined and each section requires repairing. If the Distant Stars.png Distant Stars DLC is activated as well the system can contain an unique anomaly.
  • 3 in the systems of the Ancient Caretakers if Synthetic Dawn.png Synthetic Dawn DLC is activated. The ringworld in the home system has 3 intact and one ruined section while the other two ringworlds are completely ruined and require each section to be repaired separately.
Game concepts