Silas Warner

Castle Wolfenstein is a stealth-based action-adventure shooter video game developed by Muse Software for the Apple II. It was released in 1981 and ported to MS-DOS, the Atari 8-bit family, and the Commodore 64. Beyond Castle Wolfenstein is its sequel. With an emphasis on trying to avoid detection for as long as possible, Castle Wolfenstein and its sequel are considered by gamers to be prototypical stealth-based games—some of the first in a genre that would not gain popularity until the late 1990s.