As the definitive version of the game, v3.3.0 included several final polish updates:
: Added new triggers like is_local_human_observer and expanded variable support for artifacts and societies. Crusader Kings II: Imperial Collection [v3.3.0 ...
: Introduces interactions with the off-map Chinese Empire. As the definitive version of the game, v3
: Improved scaling options and fixes for text overlaps in event windows. and legendary bloodlines.
: Adds shattered/random worlds, warrior lodges, and legendary bloodlines.