What is the default Gender Equality game rule in CK3?

Default: Gender rules are determined by Gender Laws and Faith Doctrines. (patch 1.20.1.2)

Does changing the Gender Equality rule disable achievements?

Yes for “Equal”: the file gives it the flag blocks_achievements. The other settings keep achievements on.

Game rule · Game Modes

Gender Equality

Default
Lenient
Equal ✕
Inverted

Gender Equality is a game rule in Crusader Kings III (Game Modes) with 4 settings: Default (the default), Lenient, Equal and Inverted. “Equal” disables achievements. Patch 1.20.1.2, from game/common/game_rules/00_game_rules.txt.

This section as JSON: /raw/game-rules.json

Quick answers (2)

What is the default Gender Equality game rule in CK3?: Default: Gender rules are determined by Gender Laws and Faith Doctrines. (patch 1.20.1.2)
Does changing the Gender Equality rule disable achievements?: Yes for “Equal”: the file gives it the flag blocks_achievements. The other settings keep achievements on.

4 settings

Default
Default
Gender rules are determined by Gender Laws and Faith Doctrines.
The script checks it 6 times, in 6 places
Culture 3
- Equal
- Women Only
- martial_custom_male_only
Events 3
Every has_game_rule = default_gender_equality in game/common and game/events, by the top-level object it sits in.
default_gender_equality
Lenient
Realm and Title laws which are set to Male Only will be changed to Male Preference.
The script checks it once, in 1 place
On actions (the game's own hooks) 1
- on_game_start_after_lobby
Every has_game_rule = lenient_gender_equality in game/common and game/events, by the top-level object it sits in.
lenient_gender_equality
Equal
Disables achievements
All gender-related Doctrines and Laws are set to Equal. The same rules and rights apply to all characters, regardless of gender.
The script checks it 8 times, in 8 places
Culture 3
- Equal
- Women Only
- martial_custom_male_only
Religion 2
- doctrine_gender_female_dominated
- doctrine_gender_male_dominated
On actions (the game's own hooks) 1
- on_game_start_after_lobby
Script values 1
- fp3_chance_female_leader
Scripted effects 1
- spawn_temujin_character_effect
Every has_game_rule = full_gender_equality in game/common and game/events, by the top-level object it sits in.
full_gender_equality
Inverted
All gender-related Doctrines and Laws are inverted. The rules and rights which applies to men under "Default" now apply to women, and vice versa.
The script checks it 11 times, in 10 places
Culture 3
- Equal
- Women Only
- martial_custom_male_only
Cultural traditions 3
Events 1
- Damsels in Distress
On actions (the game's own hooks) 1
- on_game_start_after_lobby
Script values 1
- fp3_chance_female_leader
Scripted effects 1
- spawn_temujin_character_effect
Every has_game_rule = inversed_gender_equality in game/common and game/events, by the top-level object it sits in.
inversed_gender_equality

Source: game/common/game_rules/00_game_rules.txt line 34 (key gender_equality), modifiers from game/common/modifiers, names from the English localisation; Crusader Kings III 1.20.1.2.