CK3 DatabaseCrusader Kings III · 1.20.1.2 “Crozier” · unofficial
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Game rule · Difficulty · Health · Historicity

Black Death Circumstance

Black Death Circumstance is a game rule in Crusader Kings III (Difficulty, Health and Historicity) with 3 settings: Historical (the default), Organic and Random. None of its settings 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 Black Death Circumstance game rule in CK3?
Historical: The Black Death will begin in Central Asia in the 14th century and spread organically through historically popular trade routes. Milan, the Pyrenees, Poland, and other historical regions will be less affected by it. (patch 1.20.1.2)
Does changing the Black Death Circumstance rule disable achievements?
No: none of its 3 settings carries the flag blocks_achievements in patch 1.20.1.2.

3 settings

  1. Historical

    Default

    The Black Death will begin in Central Asia in the 14th century and spread organically through historically popular trade routes. Milan, the Pyrenees, Poland, and other historical regions will be less affected by it.

    The script checks it 3 times, in 1 place

    Epidemics 1

    • bubonic_plague

    Every has_game_rule = bd_occurrence_historical in game/common and game/events, by the top-level object it sits in.

    bd_occurrence_historical

  2. Organic

    The Black Death will occur in a historically plausible scenario that is reactive to the current state of the game.

    bd_occurrence_organic

  3. Random

    The Black Death will originate in a completely random province on the map.

    The script checks it 2 times, in 2 places

    Script values 1

    • outbreak_chance_black_plague_mult_value

    Scripted effects 1

    Every has_game_rule = bd_occurrence_random in game/common and game/events, by the top-level object it sits in.

    bd_occurrence_random

Source: game/common/game_rules/00_game_rules.txt line 225 (key black_death_occurrence), modifiers from game/common/modifiers, names from the English localisation; Crusader Kings III 1.20.1.2.

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