Diplomacy

Version

This article may contain outdated information that is inaccurate for the current version of the game.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.

Diplomacy between plantoids and arthropoids

Diplomacy in Stellaris draws on the model of previous Paradox games. Each AI nation has an opinion and relation values which are increased by friendly actions, diplomatic agreements, and agreeable ethics - and decreased by hostile behaviour and incompatible ethics. It should be noted that the dialogue at the initial contact screen has no effect on opinion or further diplomacy.

Diplomatic Actions

Many diplomatic actions have a 10-year cooldown once chosen. Some of these are unilateral while others need to be accepted by both sides which becomes a matter of acceptance. Most diplomatic options are only accepted if the target empire holds a neutral (yellow) or better attitude.

During war, the peace and surrenders are available from the war menu.

	Action	Effects	Opinion if active	Trust	Trust Cap	Influence	Requirements
	Declare War	Enters the Wargoals menu to declare a war.	-50	-2	50	0	No Truce
	Offer Trade Deal	Allows the negotiation of a one-time deal Each AI personality has a different acceptance rate for trade deals.	0	0	50	0
	Declare/End Rivalry	Closes borders and grants the Animosity Casus Belli.	-100	-2	50	+0.5	Relative Power is not Pathetic or Overwhelming Cannot be lifted for 10 years after declaration Default Limit of Rivalries is 3 but can be increased via Ethics and Civics
	Insult	Decaying -200 opinion Opinion Modifier.	0	0	50	0
	Form/Break Defensive Pact	If either empire is attacked the other will join the war as a defender. Breaking the pact sets a 10 year truce.	+20	+0.75	100	-1	Neither empire is involved in a war
	Form/Break Non-Aggression Pact	Both empires will not be able to declare war upon each other. Breaking the pact sets a 10 year truce	0	+0.50	75	-0.25
	Form/Break Research Agreement	Applies a 25% bonus to researching technologies discovered by the other party.	0	+0.10	50	-0.25
	Form/Break Commercial Pact	Both empire will gain the economic bonuses of 10% of each other's Trade Value. Neither empire loses any profit. If one of the empires built a Branch Office on other other's worlds the former partner will gain the Expropriation Casus Belli.	0	+0.25	50	-0.25	Neither empire has the Criminal Heritage civic
	Offer/Break Migration Treaty	Allows the migration of Pops across both empires borders.	0	+0.25	50	0	Empires need to allow Pop Migration Both empires have planets with at least 20% habitability for the other's species. Neither empire has the Barbaric Despoilers civic
	Guarantee Independence	The guaranteeing empire will come to the target empire's defense if attacked but not vice versa. This is the only way to start building trust if the other empire holds a negative attitude. Revoking the guarantee sets a 10 year truce	+10	+0.25	50	-0.5	Both empires are independent The independence of up to 3 empires can be guaranteed
	Support Independence	The supporting empire will join the war against the overlord if the subject starts a war for independence. The supporting empire's power will be added to the relative power of subjects opinion modifier between the subject and the overlord.	+10	+0.25	50	0	Target is a subject
	Invite to Federation	Forms a new Federation with the Target Empire.	+50	+1	100	-2	The Federation tradition, or founding member has it Neither empire has the Barbaric Despoilers or Criminal Heritage civics
	Ask to join Federation	Requests to join an already existing Federation.	+50	+1	100	-2	Existing Federation Federation members must agree by a majority vote.
	Federation Association Status	The empire and the Federation will not be able to declare war upon each other.	+10	+0.50	100	0	The majority of federation members must agree to granting or removing the status but the associate member can cancel it at any time
	Close/Open Borders	Controls border access. The initial stance is determined by the Initial Border Status policy.	-20	0	50	0	No Truce or Rivalry
	Ask to be their Vassal/Protectorate/Subsidiary	Turns your empire into a Vassal or Protectorate. Request is only accepted by empires holding a Protective or Domineering attitude, which both require inferior relative power.	0	0	50	0
	Offer Tribute	Turns your empire into a Tributary. Request is only accepted by empires holding a Protective or Domineering attitude, which both require inferior relative power.	0	0	50	0
	Demand Vassal/Protectorate/Subsidiary Status	Asks the empire to become your Vassal or Protectorate. Refusing grants the Subjugation Casus Belli.	+25	+0.25	50	0	At least Superior Relative Power
	Demand Tribute	Asks the empire to become your Tributary. Refusing grants the Subjugation Casus Belli.	+25	+0.25	50	0	At least Superior Relative Power
	Release Subject	An overlord can always release a subject. Used to avoid risking wars of independence if the relative power of subjects becomes too great. Sets a 10 year truce between the overlord and former subject	0	0	50	0
	Integrate Subject	Integrates a Vassal or Protectorate into the overlord empire.	0	0	50	Variable	Sufficient Influence
	Request to become AE subject	Become a subject of an Awakened Empire. Awakened Empires holding an Imperious attitude will agree while those holding a Belligerent attitude will prefer a more aggressive subjugation.	0	0	0	0

Acceptance

The acceptance of diplomatic agreements by computer empires is determined by multiple factors.

Agreement	Friendly Attitude	Receptive / Cordial / Protective Attitude	Neutral / Wary Attitude	Overwhelming Relative Power	Superior Relative Power	Shared Rival	Opinion	Distance	Other factors
Non-Aggression Pact	+100	+20	0	+100	+50	+50 per Rival	+2 per 10 Opinion	-1 per hyperlane	-30 per existing Non-Aggression Pact
Commercial Pact	+100	+20	0	0	0	0	+4 per 10 Opinion	-1 per hyperlane	+1 per given Trade Value -30 per existing Commercial Pact
Research Agreement	+100	+20	0	0	0	0	+4 per 10 Opinion	-1 per hyperlane	+1 per tech either empire doesn't have -30 per existing Research Agreement
Migration Treaty	+10	0	0	0	0	0	+5 per 10 Opinion	-1 per hyperlane	+10 Loyal Attitude
Defensive Pact	+50	+20	-50	+20	+10	+30 per Rival	+2 per 10 Opinion	-1 per hyperlane	+30 per shared Defensive Pact -50 per existing Defensive Pact
Federation	+30	0	-50	+20	+10	+10 per Rival	+1 per 10 Opinion	-1 per hyperlane	+100 Federation Associate +30 Crisis -50 Different War Philosophy policy
Subject Demand	+20	0	-50	+100	+50	0	0	-5 per hyperlane	-1 per 4 owned Pops

Personality

The most specific factor that determines an empire's acceptance rate is its AI personality.

AI personality	Non-Aggression Pact	Defensive Pact	Research Agreement	Commercial Pact	Migration Treaty	Federation
Honorbound Warriors	-100	+20	0	-20	0	-10
Evangelizing Zealots	0	0	-20	-20	0	-20
Erudite Explorers	+5	+5	+50	+10	0	0
Spiritual Seekers	+20	+10	+10	+10	+20	+10
Ruthless Capitalists	-10	0	+10	+20	0	-10
Peaceful Traders	+20	0	+10	+20	+20	+10
Hegemonic Imperialists	-10	+10	-10	-10	-50	-20
Slaving Despots	-20	0	0	0	-100	-10
Decadent Hierarchy	+20	-10	0	0	-100	-30
Democratic Crusaders	0	+20	0	0	0	+10
Harmonious Collective	+20	0	+10	+10	-10	0
Federation Builders	+25	+25	+15	+15	+10	+20
Xenophobic Isolationists	+20	-20	-20	-20	-100	-50
Migratory Flock	+20	0	+20	+20	+100	+20
Fanatical Befrienders	+50	+50	+50	+50	+50	+50
Hive Mind	-10	-10	0	0	-100	-50
Rogue Servitors	0	0	0	0	0	0
Driven Assimilators	0	0	0	0		-50
Determined Exterminators	0	0	0	0		0
Machine Intelligence	0	0	0	0		-50

Trust, Threat and Distance

Trust is gained slowly by maintaining any form of lasting treaty. The maximum amount of Trust obtainable is limited by the most valuable treaty between both parties. Finishing the Diplomacy tradition tree grants +50 trust cap. Trust decays if there is no new income.

Threat is acquired by conquering systems, starbases and planets as well as by using Colossus weapons. It is seen as a form of aggressive expansion. Threat gain is dependent on the AI empire's personality and distance and reduced by half by existing non-aggression pacts or stronger deals. Shared Threat acts as a positive acceptance modifier for defensive deals.

Distance negatively affects diplomatic deals as empires farther apart in hyperlane jumps are seen as less relevant. If two empires' borders share a hyperlane connection they are considered neighbors and don't suffer distance penalty but have to deal with border friction. Two distant empires that have their owned systems connected via a wormhole are also considered neighbors.

Agreements and Ethics Attraction

Some diplomatic relationships affect the ethics attraction within an Empire. Running deals can have a great impact, based on the empire ethics of the other party - always dragging their own population towards a certain Ethic. The wrong friend can cause great internal issues for an Empire.

• War: Militarist
• Rivalry: Militarist
• Defensive Pact or Federation: Egalitarian, Xenophile, Spiritualist
• Migration Access: Egalitarian, Xenophile, Spiritualist
• Research Agreement: Materialist
• Subject: Spiritualist if the overlord is spiritualist too

Attitude

Each empire will have a specific attitude towards other empires dictated by their AI personality, diplomatic interactions and the relative power of both empires.

Attitude	Trade & Pacts	Prefer peace	Other Effects	Requirements	Description
Neutral			none		This Empire does not consider us relevant to their interests.
Wary			none	inferior relative power and shared border	This Empire maintains a cautious attitude towards us.
Receptive			more inclined to accept diplomatic pacts	diplomatic AI personalities	This Empire is interested in closer relations with us.
Cordial			more inclined to accept diplomatic pacts	high opinion	This Empire is amenable to peaceful coexistence and trading with us.
Friendly			more inclined to accept diplomatic pacts and join a federation	high opinion and successful past diplomacy	This Empire views us as a friend and may be willing to form an alliance with us.
Protective			more inclined to accept diplomatic pacts and may ask you to become their subject	high opinion and superior relative power	This Empire believes that we are weak and need their protection.
Unfriendly			none	low opinion	This Empire views us with suspicion and mistrust.
Rival			none	rival with low opinion	This Empire views us as their rival.
Hostile			none	very low opinion	This Empire views us as their enemy. They are likely to attack us if they think they can win.
Domineering			only uses the Subjugation Casus Belli	low opinion and Subjugator AI	This Empire believes that we would make a fine vassal.
Threatened			none	high threat rating	This Empire views us as a threatening menace.
Overlord			none	overlord	This Empire is our overlord.
Loyal			none	subject with positive opinion	This subject is loyal to us.
Disloyal			considers the relative power of other subjects too	subject with negative opinion	This subject resents its subservience to us.
Dismissive			none	Fallen Empire	This Fallen Empire considers us largely beneath their notice.
Patronizing			may bestow gifts	Fallen Empire with high opinion	This Fallen Empire views us as errant children in need of their guidance. They may deign to bestow gifts of technology, resources or ships on us.
Angry			will send a demand which will grant them Casus Belli if refused	Fallen Empire with low opinion	We have angered this Fallen Empire with our actions, and they may declare war to punish us.
Imperious			will ask you to become their subject	Awakened Empire	This Awakened Empire views us as a future subject. They are likely to demand we surrender our independence.
Belligerent			none	Awakened Empire whose subject demand was refused	This Awakened Empire views us as a target of conquest. They are likely to attack us.
Arrogant			no effect	Awakened Empire overlord	This Awakened Empire views us with dismissive arrogance.
Custodial			accepts joining a Federation	Guardian Awakened Empires	This Awakened Empire believes that it needs to protect us from the crisis currently threatening the galaxy. They are likely to attempt to ally us.
Enigmatic			opinion is hidden and has no impact	Ancient Caretakers	This Fallen Empire is an ancient artificial intelligence that behaves in a strange and unpredictable manner. We do not know what to expect from it.
Berserk			attacks any empire nearby	Malfunctioning Custodians	This Awakened Empire is an ancient artificial intelligence that has gone berserk. It is likely to attack anything and anyone around it.

Opinion modifiers

Opinion modifying option have no effect in a multiplayer game in relation to human players. However they will take effect if the AI takes over a human player, after the "rejoin Cooldown" has been worked off.

Permanent modifiers

There modifiers are either permanent or will persist until the diplomatic status changes and are the second most important factor in deciding how diplomacy will proceed after a first contact.

Name	Value	From	Towards
Same Authority	10	Democratic authority	Democratic authority
	10	Oligarchic authority	Oligarchic authority
	10	Dictatorial authority	Dictatorial authority
	10	Imperial authority	Imperial authority
Defender of the Galaxy	20	All empires	Defender of the Galaxy ascension perk
First Contact Hostilities	-25	Empire attacked before communications	Empire attacking before communications
First Contact War	-75	Empire with planet occupied before communications	Empire occupying planet before communications
Fanatic Purifiers	-1000	Xeno empires	Fanatic Purifiers civic
Fellow Fanatic Purifiers	200	Fanatic Purifiers of same species	Fanatic Purifiers of same species
Criminal Syndicate	-25	Default authority empires	Criminal Heritage civic
Interstellar Assembly	10	All empires	Interstellar Assembly (stage I) owner
	20	All empires	Interstellar Assembly (stage II) owner
	30	All empires	Interstellar Assembly (stage III) owner
	50	All empires	Interstellar Assembly (stage IV) owner
Variable Modifiers
Name	Value	From	Towards
Our Claims on Them	-5 per Claim	Claimed system owner	Claiming empire
Their Claims on Us	-5 per Claim	Claiming empire	Claimed system owner
Relative Power of Subjects	-1 per 1% Relative Power difference	Subject	Overlord
Border Friction	-5 for each connected system	All empires except subjects, Federation members and Fallen Empires	Empires with hyperlane connection borders
Criminal Branch Offices	-10 for each branch office	Planet owner	Branch office owner with Criminal Heritage civic
Diplomatic Relationship Modifiers
Name	Value	From	Towards
Same Overlord	50	Subject of the same Overlord	Subject of the same Overlord
Allied to Rivals	-100	Rivalry with the same third empire	Defensive Pact with the same third empire
Rivals with Allies	-100	Defensive Pact with the same third empire	Rivalry with the same third empire
Ally of Ally	25	Defensive Pact with the same third empire	Defensive Pact with the same third empire
Mutual Rivals	50	Rivalry with the same third empire	Rivalry with the same third empire
Policy Modifiers
Name	Value	From	Towards
Bombardment Policy	-10	Pacifist	Indiscriminate or Armageddon Orbital Bombardment
	-20	Fanatic Pacifist	Indiscriminate or Armageddon Orbital Bombardment
Slavery Policy	-10	Egalitarian or Xenophile	Allowed Slavery
	-20	Fanatic Egalitarian or Fanatic Xenophile	Allowed Slavery
Interference Policy	-5	Xenophobe	Passive Studies Native Interference
	-10	Fanatic Xenophobe	Passive Studies Native Interference
	10	Passive Studies Native Interference	Passive Studies Native Interference
Xenophages	-50	Egalitarian	Livestock or Grid Amalgamation slavery
	-100	Xenophile	Livestock or Grid Amalgamation slavery
Ethics Modifiers
Name	Value	From	Towards
Bright Materialists	10	Materialist	Materialist
	10	Fanatic Materialist	Materialist
	25	Fanatic Materialist	Fanatic Materialist
Wise Spiritualists	10	Spiritualist	Spiritualist
	10	Fanatic Spiritualist	Spiritualist
	25	Fanatic Spiritualist	Fanatic Spiritualist
Free Egalitarianists	10	Egalitarian	Egalitarian
	10	Fanatic Egalitarian	Egalitarian
	25	Fanatic Egalitarian	Fanatic Egalitarian
Enlightened Pacifists	10	Pacifist	Pacifist
	10	Fanatic Pacifist	Pacifist
	25	Fanatic Pacifist	Fanatic Pacifist
Materialist Fools	-10	Spiritualist	Materialist
	-20	Spiritualist	Fanatic Materialist
	-20	Fanatic Spiritualist	Materialist
	-40	Fanatic Spiritualist	Fanatic Materialist
Spiritualist Fools	-10	Materialist	Spiritualist
	-20	Materialist	Fanatic Spiritualist
	-20	Fanatic Materialist	Spiritualist
	-40	Fanatic Materialist	Fanatic Spiritualist
Egalitarian Rabble	-10	Authoritarian	Egalitarian
	-20	Authoritarian	Fanatic Egalitarian
	-20	Fanatic Authoritarian	Egalitarian
	-40	Fanatic Authoritarian	Fanatic Egalitarian
Authoritarian Tyrants	-10	Egalitarian	Authoritarian
	-20	Egalitarian	Fanatic Authoritarian
	-20	Fanatic Egalitarian	Authoritarian
	-40	Fanatic Egalitarian	Fanatic Authoritarian
Xenophilia	5	Xenophile	Same portrait main species
	10	Xenophile	Same class main species
	20	Xenophile	Different class main species
	10	Fanatic Xenophile	Same portrait main species
	20	Fanatic Xenophile	Same class main species
	40	Fanatic Xenophile	Different class main species
Xenophobia	-5	Xenophobe	Same portrait main species
	-10	Xenophobe	Same class main species
	-20	Xenophobe	Different class main species
	-10	Fanatic Xenophobe	Same portrait main species
	-20	Fanatic Xenophobe	Same class main species
	-40	Fanatic Xenophobe	Different class main species
Xenophile Diplomacy	5	All empires not Xenophobe	Xenophile with same main species class
	10	All empires not Xenophobe	Xenophile with different main species class
	10	All empires not Xenophobe	Fanatic Xenophile with same main species class
	20	All empires not Xenophobe	Fanatic Xenophile with different main species class
	10	Xenophile	Xenophile
	10	Fanatic Xenophile	Xenophile
	20	Fanatic Xenophile	Fanatic Xenophile
Xenophobic Bigots	-5	All empires	Xenophobe with same main species class
	-10	All empires	Xenophobe with different main species class
	-10	All empires	Fanatic Xenophobe with same main species class
	-20	All empires	Fanatic Xenophobe with different main species class
Wicked Cyborgs	-20	Spiritualist	Cybernetic main species
	-40	Fanatic Spiritualist	Cybernetic main species
Soulless Machines	-40	Spiritualist	Synthetic or Machine main species
	-60	Fanatic Spiritualist	Synthetic or Machine main species
Abandoned Organic Origins	-20	All empires not Materialist or Machine Intelligence	Synthetic main species
Barbaric Despoilers	-20	Militarist	Barbaric Despoilers civic
	-40	Authoritarian	Barbaric Despoilers civic
	-80	Pacifist	Barbaric Despoilers civic
	-50	All other ethics	Barbaric Despoilers civic
Personality Modifiers
Name	Value	From	Towards
Pacifist Cowards	-50	Honorbound Warriors AI Personality	Pacifist
	-100	Honorbound Warriors AI Personality	Fanatic Pacifist
Infidel Unbelievers	-100	Evangelizing Zealots AI Personality	Materialist
Xeno Filth	-1000	Fanatic Purifiers AI personality	Different main species
Fanatical Befrienders	100	Fanatical Befrienders AI personality	All empires
Metalheads	-1000	Metalheads AI personality	All empires
Is a Democracy	25	Democratic Crusaders AI personality	Democratic authority
Is an Oligarchy	-50	Democratic Crusaders AI personality	Oligarchic or Corporate authority
Is an Autocracy	-100	Democratic Crusaders AI personality	Dictatorial or Imperial authority
Oppressors	-100	Democratic Crusaders AI personality	Rogue Servitor civic
	-1000	Democratic Crusaders AI personality	Driven Assimilator civic
Fallen Empire Modifiers
Name	Value	From	Towards
Encroaching Borders	-200	Militant Isolationists	Empires with hyperlane connection to them
Desecrated Holy Planet	-200	Holy Guardians	Empires with at least one Holy World colony
Zarqulan's Chosen	+150	Holy Guardians	Head of Zarqlan relic
Devouring Swarm	-80	Enigmatic Observers	Devouring Swarm civic
Determined Exterminator	-40	Enigmatic Observers	Determined Exterminator civic
Gestalt Consciousness Modifiers
Name	Value	From	Towards
Hive Mind	-30	All empires not Gestalt Consciousness	Hive Mind
Fellow Hive Mind	30	Hive Mind	Hive Mind
Prey	-1000	Devouring Swarm civic	All empires
Devouring Swarm	-1000	All empires	Devouring Swarm civic
Machine Intelligence	-30	All empires not Materialist or Gestalt Consciousness	Machine Intelligence
Fellow Machine Intelligence	30	Machine Intelligence	Machine Intelligence
Universal Compatibility	20	Machine Intelligence	Universal Compatibility tradition
Fellow Servitors	40	Rogue Servitor	Rogue Servitor
Dreaded Assimilators	-100	All empires not Gestalt Consciousness	Driven Assimilator civic
Soul Thieves	-200	Spiritualist	Driven Assimilator civic
Biophiles	-200	Determined Exterminator civic	Rogue Servitor civic
Organic Filth	-1000	Determined Exterminator civic	Biological main species
Murderer Machines	-1000	Rogue Servitor civic or biological main species	Determined Exterminator civic
Fellow Machines	100	Determined Exterminator civic	Machine Intelligence
Fellow Exterminators	200	Determined Exterminator civic	Determined Exterminator civic
Sophisticated Machines	10	Materialist	Machine Intelligence
	20	Fanatic Materialist	Machine Intelligence
Willing Servants	20	Decadent main species	Rogue Servitor civic

Event Modifiers

Name	Value
Literary Savior	20 if you return the text during the Prince event
Book Burner	-20 if you refuse to return the text during the Prince event
Returned Wreckage Cargo	20 if you return the minerals in the wreckage anomaly event
Stole Wreckage Cargo	-20 if you claim the minerals in the wreckage anomaly event
Nurtured Forebears	100 towards Nivlac Circle if you relocate the Nivlacs in the Impossible Organism event
Discarded Forebears	-100 towards Nivlac Circle if you shot the Nivlacs into space in the Impossible Organism event
Ketling Planet Subdued	-20 towards Ketling Star Pack for every Ketling system claimed

Temporary Modifiers

These modifiers are temporary and will eventually disappear. However they can also be reinforced and increased up to a certain limit.

Variable Modifiers

Name	Value	Decay	Limit
Broke Trade Pact	-1 per 1/5 of the value of your side of the trade agreement	2	-200
Favorable trade deal	1 per every trade acceptance point above 1	2	100
Threat	-2 per system conquered by you -4 per starbase conquered by you -8 per planet conquered by you x0.5 if Non-Aggression Pact	0.25	-1000
Mutual Threats	1 per conquered system 2 per conquered starbase 4 per conquered planet	0.25	200
Genocidal	-5 per purged pop if Egalitarian -5 per purged pop if Xenophile -10 per purged pop if Fanatic Egalitarian -10 per purged pop if Fanatic Xenophile -5 per purged pop if Benevolent Interventionists	1	-1000
Purged our Species	-25 per purged pop of same species	1	-1000

Fallen Empires Only

Name	Value	Decay	Limit
Accepted Gift	50	2	50
Accepted Demands	25	1	100
Refused Demands	-200	1	-200
Spurned Gift	-50	1	-100
Failed Task	-50	1	-50
Failed Major Task	-200	1	-200
Refused Task	-25	1	-25
Completed Task	100	1	200
Refused Request	-50	1	-100
Accepted Request	100	2	200
Refused Subjugation	-200	1	-200

DLC

Name	Value	Decay	Source	DLC
War in Heaven Winner	200	5	Same side winning the War in Heaven	Leviathans
War in Heaven Ally	100	2	Subjects of the same FE in War in Heaven	Leviathans
War in Heaven Enemy	-100	2	Subjects of opposing FE in War in Heaven	Leviathans
League of Non-Aligned Systems	200	2	Both members of the League of Non-Aligned Systems	Leviathans
Refused to join the League of Non-Aligned Systems	-100	1	Not joining the League	Leviathans
Destroyed Trader Enclave	-15	2	Destroying any Trader Enclave station	Leviathans
The Blind Wanderer	-40	2	The Blind Wanderer Dyson Sphere event choice	Utopia
Shots Fired	-40	2	The Blind Wanderer Dyson Sphere event choice	Utopia
Gland Thieves	-200	1	Fountain of Gold Science Nexus event choice	Utopia
Mind Invasion Attempt	-35	2	Failing to spy on a Fallen Empire from the Shroud	Utopia
Brought on the End	-1000	5	The Reckoning	Utopia
Mechanical Hubris Redeemed	80	1	Defeated a machine uprising and their empire is organic	Synthetic Dawn
Machine Oppressor	-80	1	Defeated a machine uprising and their empire is mechanical	Synthetic Dawn
Rebellious Robots	-80	1	Defeating your creators as a machine uprising and their empire is organic	Synthetic Dawn
Self-Emancipator	80	1	Defeating your creators as a machine uprising and their empire is mechanical	Synthetic Dawn
Cracked a Primitive World	-40	1	Using a World Cracker on a world with a pre-FTL civilization	Apocalypse
Cracked our World	-1000	1	Using a World Cracker on one of their colonies	Apocalypse
Shielded our World	-200	1	Using a Global Pacifier on one of their colonies	Apocalypse
Swept a Primitive World	-40	1	Using a Neutron Sweep on a world with a pre-FTL civilization	Apocalypse
Swept our World	-800	1	Using a Neutron Sweep on one of their colonies	Apocalypse
Converted our World	-400	1	Using a Divine Enforcer on one of their colonies	Apocalypse
Assimilated a Primitive World	-40	1	Using a Nanobot Diffuser on a world with a pre-FTL civilization	Apocalypse
Assimilated our World	-600	1	Using a Nanobot Diffuser on one of their colonies	Apocalypse
Liberated Planet	40	1	Returning a planet the Horde conquered from them after occupying it	Apocalypse
Kept Liberated Planet	-20	1	Annexing a planet the Horde conquered from them after occupying it	Apocalypse
Destroyed Curator Enclave	-15	2	Destroying any Curator Enclave station	Distant Stars OR Leviathans

Opinion Effects

Aside from determining an empire's attitude, opinion also affects certain quests such as The Prince. In addition, a negative opinion can trigger certain events from empires that aren't Pacifist or Fanatic Pacifist.

• An opinion below -50 can trigger a governor assassination event
• An opinion below -100 can trigger an objection to expansion event

References

Game concepts