During the Second World War, German scientists conducted experiments on people and monkeys in one of the castles lost in the mountains. They crossed genes to create a powerful breed of mutants. In the game Return To Castle: Monkey Ball, you will have to enter the dungeon of this castle and plant a bomb there to destroy it. In front of you on the screen there will be corridors of the underground labyrinth along which your character will move with weapons in his hands. Look carefully in all directions. Corridors are patrolled by enemy soldiers. If you meet fascists, you will need to engage them in battle. Shooting accurately from your weapon or using grenades, you will have to destroy all your enemies. After their death, collect trophies that can fall from the Nazis.