The Northern Lords achievement

King of all the Isles

Starting and staying as a North Germanic Ásatrúan of any kind, Completely Control everything in the Dlc Fp1 Achievement King Of All The Isles Region without ever having over 80 Realm Size

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) (5 lines of game script)

custom_description = {
	text = king_of_all_the_isles_achievement_trigger
	fp1_achievement_culture_plus_religion_norse_trigger = yes
	completely_controls_region = dlc_fp1_achievement_king_of_all_the_isles
}

As written in game/common/achievements/fp1_achievements.txt.

Still possible while (possible) (2 lines of game script)

exists = global_var:started_king_of_all_the_isles_achievement
realm_size <= 80

As written in game/common/achievements/fp1_achievements.txt.

Source: game/common/achievements/fp1_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.