The Ghosts of Castle Turnwall, also known as Ab durch die Mauer in Germany, is the family game about ghosts who won't let mere walls stop them when they hunt for the best costumes throughout a rotating, magnetic castle.

Each player controls their own ghost inside the castle. When it is a player's turn, that player can perform up to three magical movements. Not only can they move their ghost from space to space, but they can also choose to move sliders underneath the floor or even rotate the whole playing board. The magnets inside the sliders cause the ghosts to fly through the castle's walls while hunting for the best possible costume. The first player to collect four different costume pieces is the winner.