RimWorld

A sci-fi colony simulation powered by an intelligent AI storyteller. It generates emergent stories by simulating psychology, ecology, gunplay, melee combat, climate, biomes, diplomacy, interpersonal relationships, art, medicine, trade, and more.

RimWorld follows three survivors of a crashed space liner as they try to build a colony on a frontier world at the rim of known space. It draws inspiration from the space western tone of Firefly, the deep simulation of Dwarf Fortress, and the epic scale of Dune and Warhammer 40,000. Oversee colonists’ moods, needs, thoughts, and the impact of individual wounds and illnesses. Take part in tightly simulated small-team gunfights. Build structures, weapons, and clothing from metal, wood, stone, cloth, or exotic futuristic materials. Defend your colony from pirate raiders, hostile tribes, rampaging animals, and ancient killing machines. Each playthrough generates a new world to discover. Settle biomes from desert to jungle to tundra, each with its own plants and wildlife. Guide colonists with distinct backstories, traits, and skills. Learn quickly with help from an intelligent, unobtrusive AI tutor.