Californium is a first-person adventure inspired by the life and work of science fiction author Philip K. Dick. You play Elvin Green, a struggling writer in 1960s Berkeley whose sense of reality starts to break down. As the world around him shifts between versions of itself, he searches for the cracks hidden in his surroundings to find out what is really going on.
There is no combat, and the game is mostly about looking closely at each scene, solving riddles and following a strange, dreamlike story. It is single-player and fairly short. It suits players who enjoy surreal narratives and literary references, and who are happy with an experience driven by exploration rather than challenge.