High Quality Content by WIKIPEDIA articles! Star Wars Jedi Knight: Mysteries of the Sith is an expansion pack for the first person shooter Star Wars Jedi Knight: Dark Forces II. It was developed and published by LucasArts, and released on January 31, 1998. The expansion includes a single-player mode and fifteen multiplayer maps. The multiplayer mode allows up to eight players to play online or over a network. It was re-released onto Steam along with its predecessors and sequels.