Sub Terra is a fully cooperative survival horror board game. You and up to five friends are cave explorers who have become trapped deep underground. You must quickly explore a tile-based cave system, utilise your character's specialist skills and carefully manage your actions to find the way out before your flashlights die and you're lost in the darkness forever. You'll need to work together to overcome deadly subterranean hazards - stick together for safety, or split up to cover more ground. One wrong step could knock you unconscious and your friends will need to stage a rescue. Light and hope are scarce. And worst of all, you don't think you're alone down here...