Castle Wolfenstein is a two-dimensional action-adventure game that is played from a top-down perspective using a keyboard, joystick, or paddles. It has also been described as a maze game. There are eight difficulty levels in the game that are determined by the player's rank. The player takes the role of an Allied spy that has been captured by Nazis and imprisoned in a dungeon within Castle Wolfenstein for interrogation by the SS Stormtroopers. While the spy is waiting for interrogation, a dying prisoner emerges from a hiding place and hands the player a fully loaded pistol with 10 rounds, and three grenades before passing away. The objective is to escape from the castle and if the player finds the battle plans before escaping, they will be promoted and the complexity of the subsequent run will be increased, while the castle's layout changes and the game starts again.
