An exceptionally deep strategic colony simulator and unparalleled story generator. RimWorld combines complex psychological pawn parameters and active resource planning with systemic AI storytellers to produce unforgettable tales of survival, tragedy, and triumph.

RimWorld is a deep, highly strategic colony simulator and story generator managed by a systemically active AI Storyteller (Cassandra, Phoebe, or Randy Random). You guide a group of shipwrecked survivors on a procedurally generated alien planet. Rather than directly controlling characters, players designate tasks: building shelters, farming potatoes, taming animals, researching electronics, and tailoring clothes. The mechanical heart of the game is the detailed psychological and physiological simulation of colonists: each character possesses distinct traits (like Pyromaniac, Cannibal, or Kind), relationship networks, and detailed health status (down to individual fingers, limbs, and internal organs). Colonists suffer mental breaks (like fire-starting sprees or catatonic states) if their mood parameters drop due to pain, cold, or teammate deaths. AI Storytellers dynamically generate events—such as toxic fallout, raider sieges, plague, or animal stampedes—testing your colony's resource planning.