1) The first in the Wolfenstein games. Used 2D overhead view and was released for the Apple 2 computer and the Commodore 64. It also used voice samples. It was about a US soldier who has to escape from Castle Wolfenstein and avoid Nazi's.
2) The Castle in the Wolfenstein game series.
3) Also reffered to as Wolfenstein 2D, has a sequal and a FPS created by ID software.
Castle Wolfenstein, Beyond Castle Wolfenstein, Wolfenstein 3D, Spear of Destiny, Return to Castle Wolfenstein.