Mount Blade -

: Developers have built grammar-based rules to procedurally generate endless varieties of quests to prevent the late-game from getting dull. 👑 In-Game Content Creation

If you are looking to generate physical assets or quests to break up repetitive gameplay:

: A popular mod on Nexus Mods that allows you to configure options and generate custom weapons and armor files.

: Self-generating your own narrative by roleplaying, expanding slowly by the seasons, and managing your own custom kingdom.