Dark Castle is a 1986 computer game for the Macintosh published by Silicon Beach Software, later ported to various platforms, where it was published by Three-Sixty Pacific. It was designed and illustrated by Mark Pierce and programmed by Jonathan Gay.
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, though it was not released until March 14, 2008.
Source: Wikipedia, "Dark Castle", available under the CC-BY-SA License.