Bleed , the phenomenon when role-players experience moments where their real life feelings, thoughts, relationships, and physical states spill over into their characters’ and vice versa.
CRPG , computer-based role-playing game.
CYOA , Choose Your Own Adventure solo role-playing game interactive books.
MMORPG - Massive Multiplayer Online Role-playing game
MOO -
MUD - Multi-User Dungeon
MUSH - Multi-User Shared Hallucination