The game consists of a single story-line episode, divided into 21 levels, 19 of which must be completed to win the game. The remaining two are secret levels that can be accessed from within the first 18. The gameplay is comparable to that of Wolfenstein 3D, which uses the same game engine. The levels are divided into four blocks (focusing respectively on the castle’s tunnels, dungeons, main keep, and ramparts), each ending with the player having to defeat a “boss”. This release requires an 68030 and 8MB of fast RAM.