Roads to Power achievement
Birthright
As a Legitimist Adventurer, win a claim war for a Kingdom or Empire
Conditions as the game checks them
Possible decides whether the achievement can still be earned in a run; happened is the check that unlocks it (common/achievements/_achievements.info).
Unlocks when (happened) (4 lines of game script)
custom_description = {
text = birthright_achievement_trigger
exists = global_var:finished_birthright_achievement
}As written in game/common/achievements/ep3_achievements.txt.
The file gives no “possible” condition for this one.
Source: game/common/achievements/ep3_achievements.txt, game/common/achievement_groups.txt and the English localisation, Crusader Kings III 1.20.0.3. Unlock share: Steam Web API, 2026-10-02.