・This is a two-player game with simple rules, offering enjoyable deduction and bluffing. ・Players battle using ghost pieces. ・The win conditions are: capturing all of the opponent's good ghosts, having the opponent capture all of your bad ghosts, or having a good ghost escape from an exit in the opponent's territory. ・You don't know which ghosts are good, so you must deduce their identities from the opponent's movements and capture them.