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Megastructures

(Redirected from Matter Decompressor)

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This article has been verified for the current PC version (2.7) of the game.
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.

Contents

ConstructionEdit

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.

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   Mega Engineering technology.

There is no way to construct an additional Science Nexus, Sentry Array, Mega Art Installation, Strategic Coordination Center, or Mega Shipyard. You can build all of these structures, but only one of each. Other buildings can be constructed multiple times.

BonusesEdit

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

  •   Master Builders ascension perk increases the build speed by +50%
  •   Living Metal Mega-Construction edict increases the build speed by +50%
  •   Architectural Renaissance unity ambition also increases the build speed by +50%
  •   Using the Isolated Contingency Core relic greatly increases the build speed by +300% for 10 years

GatewaysEdit

 
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   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 and 2500   alloys. The   Gateway Activation technology can appear as a research option as soon as a Gateway has been discovered and   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   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 and 2500   alloys. Upgrading it to a gateway takes 5 years and costs 6000   energy and 2500   alloys. Gateways must be built near the outer edge of systems, away from gravity wells.

Gateways can't be deactivated or destroyed once they are fully activated or constructed.

HabitatsEdit

 
Mammalian size 8 habitat

Artificial planets in all but name, habitats have 70%   habitability for all species that can be built above planets. 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. Its appearance is dependent on the builders' empire appearance. They still requires colonization but the colony develops 3 times faster on a Habitat.

Habitats come in 3 sizes. Construction ships can construct habitats of the first size, which can then be upgraded via a Decision once all District slots are filled. Unlike other megastructures habitats do not require a construction site and are finished in one go by the construction ship. They cannot be built on worlds with an anomaly.

Habitats can be researched and built by any empire if   Utopia DLC is installed. Otherwise, it's only available to empires with the   Void Dwellers origin, which requires the   Federations DLC.

Size Cost Time Housing buildings Required technology
4   150
  1500
1800 days   Gestalt Consciousness only   Orbital Habitats
6   1000 720 days     Habitat Expansion
8   1500 1440 days     Advanced Space Habitation

The   Voidborne Ascension Perk increases their   Habitability to 90% and grants them two additional building slots.

Multi-stage megastructuresEdit

Multi-stage megastructures are constructed in multiple stages that require the technology of the same name before they can be constructed or upgraded. 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.

It is only possible to build, upgrade, or restore one multi-stage megastructures at a time. The limit can be increased by +1 for each of the following:

  •   Master Builders ascension perk
  •   Architectural Renaissance ambition edict
  •   Level 5 Research Cooperative president

Multi-stage megastructures can only be built once per empire and can't be destroyed, except for the Ring World segments. Megastructures conquered from other empires as well as ruined and repaired ones found in the galaxy do not count against the limit.

Megastructure Stage Production Upkeep Time Cost Notes AP DLC
Ring World
 
Site None   -5   5 years   300
  5000
  • Cannot be built in systems with black holes or 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%   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 may have   Nanites deposits
  • Upon completion of the frame all planets are removed from the system
  • Multiple segments can be built at the same time if the empire has the capacity to work on more than one megastructure simultaneously
   
Stage I (Frame) None None   13.3 years   10000
Stage II (1 Segment)   +1 Habitable Segment None   10 years   10000
Stage III (2 Segments)   +2 Habitable Segments None   10 years   10000
Stage IV (3 Segments)   +3 Habitable Segments None   10 years   10000
Stage V (Completed)   +4 Habitable Segments None   10 years   10000
Dyson Sphere
 
Site None   -5   5 years   300
  5000
  • 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
  • If the star has a mining station it is removed when the megastructure is completed
  • If any planet has the   Terraforming Candidate modifier it is removed
   
Stage I (Frame) None None   10 years   10000
Stage II (Partial 25%)   +1000 Energy None   10 years   10000
Stage III (Partial 50%)   +2000 Energy None   10 years   10000
Stage IV (Partial 75%)   +3000 Energy None   10 years   10000
Stage V (Completed)   +4000 Energy None   10 years   10000
Science Nexus
 
Site None   -25   5 years   300
  5000
  • The final stage of a Science Nexus can be upgraded to produce 50 more   Research through an event that has a 30% chance to trigger a short time after the Megastructure is finished
 
Stage I (Hub)   +100 Research
  +5% Research Speed
  -50   10 years   15000
Stage II (Research Wings)   +200 Research
  +10% Research Speed
  -75   10 years   15000
Stage III (Completed)   +300 Research
  +15% Research Speed
  -100   10 years   15000
Sentry Array
 
Site None   -20   5 years   300
  5000
  • Until finished the Sentry Array cannot see through nebulae
  • As no system will have low intel level a completed Sentry Array will prevent space creatures from respawning
 
Stage I (Sentry Hub)   +20 Hyperlane Scanner Range   -40   5 years   10000
Stage II (Sentry Spire)   +40 Hyperlane Scanner Range   -60   5 years   10000
Stage III (Sentry Aerials)   +60 Hyperlane Scanner Range   -80   5 years   10000
Stage IV (Completed)   Entire Galaxy Hyperlane Scanner Range   -100   5 years   10000
Matter Decompressor
 
Site None   -5   5 years   300
  5000
  • Can only be constructed around black holes
  • If the black hole has a research station it is removed when the megastructure is completed
   
Stage I (Anchor)   +500 Minerals   -25   10 years   12500
Stage II (Lensing)   +1000 Minerals   -50   10 years   12500
Stage III (Boring)   +1500 Minerals   -75   10 years   12500
Stage IV (Completed)   +2000 Minerals   -100   10 years   12500
Mega Art Installation
 
Site None   -5   5 years   300
  5000
  • The final stage requires the   Ancient Relics DLC and is not available if the empire is   Xenophobe or   Fanatic Xenophobe
  • A ruined Mega Art Installation will be repaired to stage 3 and can be upgraded to stage 4 as with the constructed version
 
Stage I (Nascency)   +100 Unity
  +5% Amenities
  -10   10 years   15000
Stage II (Maturity)   +200 Unity
  +10% Amenities
  -20   10 years   15000
Stage III (Completed)   +300 Unity
  +15% Amenities
  -30   10 years   15000
Stage IV (Perfection)   +400 Unity
  +20% Amenities
  -30   10 years   100
Strategic Coordination Center
 
Site None   -5   5 years   300
  5000
 
Stage I (Hull)   +50 Naval Capacity
  +2 Starbase Capacity
  +4 Defense Platforms
  +5% Sublight Speed
  -25   10 years   15000
Stage II (Comms)   +100 Naval Capacity
  +4 Starbase Capacity
  +8 Defense Platforms
  +10% Sublight Speed
  -50   10 years   15000
Stage III (Completed)   +150 Naval Capacity
  +6 Starbase Capacity
  +12 Defense Platforms
  +15% Sublight Speed
  -75   10 years   15000
Interstellar Assembly
 
Site None   -5   5 years   300
  5000
 
Stage I (Locus)   +10% Diplomatic Weight
  +10 Opinion from all empires
  -10   5 years   10000
Stage II (Consul Ring)   +20% Diplomatic Weight
  +10 Opinion from all empires
  +1 Available Envoys
  -20   5 years   10000
Stage III (Forum Modules)   +30% Diplomatic Weight
  +30 Opinion from all empires
  +1 Available Envoys
  -30   5 years   10000
Stage IV (Completed)   +40% Diplomatic Weight
  +40 Opinion from all empires
  +2 Available Envoys
  -40   5 years   10000
Mega Shipyard
 
Site None   -5   5 years   300
  3000
  • All ships start with 100 experience
  • Can only be built around star, in one-star systems,and there is no research station/mining station on it.
  • Once Complete can build Titans, Colossi, and Juggernauts as if it had Titan Yards and Colossus Yards
 
Stage I (Framework)   +5 Shipyard Capacity
  +33% Empire Ship Build Speed
  -10   5 years   10000
Stage II (Core)   +10 Shipyard Capacity
  +66% Empire Ship Build Speed
  -20   5 years   10000
Stage III (Complete)   +20 Shipyard Capacity
  +100% Empire Ship Build Speed
  Titan, Colossus, and Juggernaut construction
  -40   5 years   10000

Ruined megastructuresEdit

 
Ruined Dyson Sphere

A ruined version of a multi-stage megastructure can be found while exploring the galaxy, with the larger galaxies having a chance to spawn more ruined megastructures. Repairing them only requires the   Mega-Engineering technology. If not yet researched, owning a system with a ruined megastructure also grants a x20 weight for   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   Alloys System notes
Dyson Sphere 7200 20000
Science Nexus 4800 15000
Sentry Array 4800 15000 Contains a Tomb World
Matter Decompressor 4800 20000
Mega Art Installation 4800 20000 Is always a trinary system
Strategic Coordination Center 4800 15000
Interstellar Assembly 3600 15000 Contains deposits on most celestial bodies
Mega Shipyard 3600 10000

Conquerable RingworldsEdit

Up to 8 ringworlds can spawn naturally in a game in various states. Damaged segments can be repaired with the   Mega-Engineering technology 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 DLC is activated. It is completely ruined and each section requires repairing. If the   Distant Stars DLC is activated as well the system has a 50% chance to contain an unique anomaly.
  • 3 in the systems of the Ancient Caretakers if   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. If the Contingency appears and the Ancient Caretakers awaken to defend the galaxy, they will also disappear like the Cybrex once the Contingency is defeated, leaving their systems free for the taking.
  • 1 in the home system of regular empires with the Shattered Ring origin. 2 segments are ruined but reparable, while 1 segment is irreparably damaged.
  • Each empire with the   Shattered Ring origin starts in a ringworld system with an intact segment and two damaged ones. By default only one empire with the origin can be generated but force-spawning will ignore the limit.