The Reincarnation Game is a board game that Champa acquired in order to play against Beerus with. It is the main setting for Dragon Ball: That Time I Got Reincarnated as Yamcha.
Overview[]
The game is played by using an individual's soul and reincarnating it into a different individual in order to pit the reincarnated souls against each other in battle. A player presumably wins by having their chosen soul defeat the other players' souls in combat. The setting of the game is also presumably determined by the players themselves, as Beerus and Champa likely chose to use the Dragon World as their battleground.
The only instance of this game being played is between Beerus and Champa, who used one soul each: Beerus using a deceased boy's soul and Champa using the soul of Oushou to reincarnate as Yamcha and Chiaotzu, respectively. Due to both souls coming to terms with one another and ceasing battle, neither Beerus nor Champa win the game, although Beerus claims that because Yamcha was stronger, he was victorious and promptly destroyed the Reincarnation Game board, leaving Champa upset that his efforts to acquire the game had been in vain and Beerus irritated that Champa should have gotten a better game. Whis then returned the boy and Oushou's souls back to their original bodies outside of the Dragon World.