Undo is a cooperative game that has players trying to change fate. The game begins with the death of a person. Players journey into that character's past, learning who they are and what brought them to the place where they died. The goal is to try to alter the character's path, so they live. The game features cards that allow players to jump back in time to a moment of change. By exploring clues, players unravel a mystery about what brought the deceased to their unfortunate end. Then players pick a corresponding fate card they can use to render a different decision. Not every choice is a good one, though. Depending on what card was picked players gain positive points to change things for the better, negative points that make things worse, or no points, meaning nothing changed the outcome. At the end the game, the team must have compiled enough points to undo the character's death.