If you want a rule to have a different default value when using alternate starts, use alt_start_default =.

Parameter 'achievements = no' adds to LOCALIZATION_KEY_FOR_OPTION_DESC a red text ' This option turns off achievements.' (localisation key 'RULE_ACHIEVEMENTS_WARNINGS' in ReapersDue.csv).

You can create custom rule group, for example group = 'RULE_GROUP_MY_MOD'.

Defaults to yes even if achievements = no.

The same is true for alt_start_achievements = yes/no, which determines whether the option disables achievements when using alternate starts (shattered/randomised world).

This doesn't make sense to be used for mods, as they already disable achievements by changing the checksum.

Each option can have achievements = yes/no.

If certain rule only makes sense to appear with a DLC, it can use dlc = 'The Reaper's Due'.

The first option is the default one at game start.

Rules are defined in folder common/game_rules/. The benefit of game rules is that they have a nice dedicated UI to manage the options at the start of a game, so there's less modding needed than using decisions.

In their simplest form (on/off), they are similar to boolean global flags, but can get more complex (fewer/default/more). Game rules are enumerated global values, that can only be modified at game start. Please help with verifying or updating older sections of this article.Īt least some were last verified for version 2.6.

Ck2 change game rules