Game rule

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Game rules are configuration choices available when starting a new game that can slightly alter some mechanics. Many such option will disable Achievements.

Difficulty[edit]

The difficulty setting can grant players the following bonuses:

Difficulty Hostile Scheme Resistance  Fertility Short Reign Duration Tyranny Gain  Stress Gain  Knight Survival Minor Disease Chance  Health Boost Factions.png Faction Formation Vassal Opinion Liege Opinion Achievements
Very Easy +30 +20% -50% -75% -50% +75% -75% Moderate Significantly Slower +25 +50 Icon achievements disabled.png
Easy +15 +10% -25% -25% -25% +66% -15% Small Slightly Slower 0 0 Icon achievements disabled.png
Normal 0 0 0 0 0 0 0 None Regular 0 0 Icon achievements enabled.png

Gameplay options[edit]

The gameplay options can change the game to be less historical.

Rule Setting Effects Achievements
Exclave Independence Off Rulers can have disconnected land anywhere in the world Icon achievements enabled.png
Limited (AI Only) AI Rulers at peace will lose disconnected land on succession unless it's part of their de jure territory or is connected to the capital by one county or a naval path. Icon achievements enabled.png
Significant (AI Only) AI Rulers at peace will lose disconnected land on succession unless it's part of their de jure territory or is connected to the capital by a naval path. Icon achievements enabled.png
Total (AI Only) AI Rulers at peace will lose disconnected land on succession unless it's connected to the capital by a naval path. Icon achievements enabled.png
Limited Rulers at peace will lose disconnected land on succession unless it's part of their de jure territory or is connected to the capital by one county or a naval path. Icon achievements enabled.png
Significant Rulers at peace will lose disconnected land on succession unless it's part of their de jure territory or is connected to the capital by a naval path. Icon achievements enabled.png
Total Rulers at peace will lose disconnected land on succession unless it's connected to the capital by a naval path. Icon achievements enabled.png
Multiplayer: Murder Schemes Default Players can use Hostile Schemes against other players and their families Icon achievements enabled.png
No Players Players cannot use Hostile Schemes against other players but can against their families Icon achievements enabled.png
No Player Families Players cannot use Hostile Schemes against other players or their families Icon achievements enabled.png
Minor Diseases Default Minor diseases appear as per normal Icon achievements enabled.png
Fewer Minor diseases appear 30% less often Icon achievements disabled.png
Gender Equality Default All faiths start with their historical views on gender, clerical gender, male adultery and female adultery doctrines
All realms start with their historical gender succession law
Icon achievements enabled.png
Equal All faiths start with the Equal views on gender doctrine and Either clerical gender doctrine
All faiths start with male adultery and female adultery doctrines at the same level (the lesser one)
All realms start with the Equal gender succession law
Icon achievements disabled.png
Inverted All faiths start with their historical views on gender, clerical gender, male adultery and female adultery doctrines inverted
All realms start with their historical gender succession law inverted
Icon achievements enabled.png
Regional Heresies Strict Heresies are 200 times more likely to be historical if they happen in certain regions Icon achievements enabled.png
Default Heresies are 5 times more likely to be historical if they happen in certain regions Icon achievements enabled.png
Relaxed Heresies are random no matter where they happen Icon achievements enabled.png
Mongol Invasion Default An AI character will use the Become Greatest of Khans decision between the years 1180 and 1250 if the player doesn't do it before Icon achievements enabled.png
Never Only player characters can use the Become Greatest of Khans decision Icon achievements disabled.png
Random An AI character can use the Become Greatest of Khans decision at any point if the player doesn't do it before Icon achievements enabled.png
Casus Belli Costs Default Casus Bellis cost resources Icon achievements enabled.png
No Costs Casus Bellis do not cost resources Icon achievements disabled.png
Culture Conversion Speed Significantly Slower The Promote Culture councilor task makes progress 4 times slower Icon achievements enabled.png
Slower The Promote Culture councilor task makes progress 2 times slower Icon achievements enabled.png
Default The Promote Culture councilor task makes progress as per normal Icon achievements enabled.png
Faster The Promote Culture councilor task makes progress 2 times faster Icon achievements disabled.png
Significantly Faster The Promote Culture councilor task makes progress 4 times faster Icon achievements disabled.png
Faith Conversion Speed Significantly Slower The Convert Faith in County councilor task makes progress 4 times slower Icon achievements enabled.png
Slower The Convert Faith in County councilor task makes progress 2 times slower Icon achievements enabled.png
Default The Convert Faith in County councilor task makes progress as per normal Icon achievements enabled.png
Faster The Convert Faith in County councilor task makes progress 2 times faster Icon achievements disabled.png
Significantly Faster The Convert Faith in County councilor task makes progress 4 times faster Icon achievements disabled.png
Diplomatic Range Restricted Diplomatic Range is reduced by 25% Icon achievements enabled.png
Default Diplomatic Range remains unchanged Icon achievements enabled.png
Unrestricted Characters can interact no matter the distance Icon achievements disabled.png
End Date 1453 The game will end in 1453 Icon achievements enabled.png
No End Date The game will never end Icon achievements disabled.png
De Jure Requirement On Every 5 years titles with de jure land will be destroyed if their holder controls none of their de jure land Icon achievements enabled.png
On (Limited) Every 5 years titles with de jure land will be destroyed if their holder controls none of their de jure land unless it's a player's primary title Icon achievements enabled.png
Off Titles with de jure land can only be destroyed manually Icon achievements enabled.png
Custom Kingdoms On The Found a New Kingdom and Found a New Empire decisions are available Icon achievements enabled.png
Off The Found a New Kingdom and Found a New Empire decisions are not available Icon achievements enabled.png
Generate Families On Landed characters with no recorded family will start with a spouse, a valid heir, a second child if the mother is over 25 and a third child if the other is over 33 Icon achievements enabled.png
On (AI Only) Landed AI characters with no recorded family will start with a spouse, a valid heir, a second child if the mother is over 25 and a third child if the mother is over 33 Icon achievements enabled.png
Off Landed characters with no recorded family will not start with any family Icon achievements enabled.png
Same-Sex Relations Default All faiths start with their historical same-sex relations doctrine Icon achievements enabled.png
Accepted All faiths start with the Accepted same-sex relations doctrine Icon achievements disabled.png
Sexuality Distribution Default Characters have a 89% chance to be heterosexual, 5% chance to be homosexual, 5% chance to be bisexual and 1% chance to be asexual Icon achievements enabled.png
Bisexuality Characters have a 89% chance to be bisexual, 5% chance to be homosexual, 5% chance to be heterosexual and 1% chance to be asexual Icon achievements enabled.png
Homosexuality Characters have a 89% chance to be homosexual, 5% chance to be heterosexual, 5% chance to be bisexual and 1% chance to be asexual Icon achievements enabled.png
Asexuality Characters have a 89% chance to be asexual, 3.6% chance to be homosexual, 3.6% chance to be bisexual and 3.6% chance to be heterosexual Icon achievements enabled.png
Equal Characters have equal chances to be heterosexual, homosexual, bisexual and asexual Icon achievements enabled.png
Faith Acceptance Default All faiths start with their historical views on other faiths Icon achievements enabled.png
Full All faiths start with the Full Tolerance special doctrine Icon achievements disabled.png
Randomized Faiths Off All characters and counties start with their historical faith Icon achievements enabled.png
On All characters and counties start with a random faith Icon achievements disabled.png
Random Ruler Placement Off All rulers have start with their real historical titles Icon achievements enabled.png
On All rulers have start with random historical titles Icon achievements disabled.png
On (Conversion) All rulers have start with random historical titles and convert to the faith of their primary title's capital Icon achievements disabled.png
Character Nudity Default Characters will appear naked in certain events or if they follow a faith with the Natural Primitivism tenet or are Court Chaplains or Zealous and follow a faith with the Naked Priests doctrine Icon achievements enabled.png
Never Characters cannot appear naked Icon achievements enabled.png
Hungarian Migration Historical An AI character will use the Prepare to Cross the Carpathians decision between the years 890 and 910 if the player doesn't do it before Icon achievements enabled.png
Random An AI character will use the Prepare to Cross the Carpathians decision between the years 872 and 910 if the player doesn't do it before Icon achievements enabled.png
Immediate The Mogyër Confederation starts having used the Prepare to Cross the Carpathians and in a war against the Kingdom of Bulgaria using the Migrate to Pannonia casus belli Icon achievements enabled.png
Player-Only Only player characters can use the Prepare to Cross the Carpathian decision Icon achievements disabled.png

Ironman[edit]

Ironman is a special game rule that disables character switching and manual saving. The game is saved automatically once every 6 months as well as when exiting the game. Achievements can only be obtained in Ironman mode. In Ironman mode, the game over screen only has the option to exit to the main menu.