Return to Dark Castle is a 2008 platform game for Mac OS X developed by Z Sculpt.

In February 2011, Super Happy Fun Fun, Inc. released an updated version of the game on the Mac App Store that included all 30 original Dark Castle and Beyond Dark Castle levels and added 50 new levels.

The player fights their way through various areas, inside and around the Dark Castle, in an attempt to defeat the Black Knight.

The player's character, named Bryant by default, is the nephew of Duncan, the protagonist of the earlier Dark Castle games.

In the game's intro, it is revealed that Duncan never returned from his quest to the Dark Castle.

This allows a player to save their progress and return later, which is important given the large number of additional levels compared to the original games.