User summary: Characters in the game are alone and believe they are the "sole" survivor of an apocalyptic event (the game suggests several options, but play can use any apocalypse). Play alternates between characters and is developed through narration. The game allows - but does not require - the characters to meet near the end of play, but only if the characters have accepted they are the last remaining person. One of the more intriguing aspects of the core rules involves various types and conditions required for different types of apocalyptic events.