Wolfenstein
The "Wolfenstein" series of video games started with the 1981 stealth-adventure video game "Castle Wolfenstein". It was developed by American programmer Silas Warner, a pioneer in the early eras of video gaming, especially the stealth genre. It was published by his (then) company M.U.S.E. Inc. (Muse Software). The player controls an unnamed American prisoner of war as he steals war files containing information about secret German war plans while avoiding or sometimes killing guards, and tries to escape the fortified Nazi stronghold Castle Wolfenstein, set during World War II. The game is often credited as one of the first video games of the stealth genre, since it focuses more on avoiding or disarming enemies, and killing them is considered a last resort.
Dark Castle
"Dark Castle" is a platform game where a young hero named Duncan tries to make his way to the evil Black Knight, dodging objects as well as solving occasional puzzles. The game is notable for its use of sampled sounds to great effect. A sequel titled "Beyond Dark Castle" was released in 1987. A second sequel, "Return to Dark Castle", was announced in 2000, but it was not released until March 14, 2008.