
Some are capable of causing damage to enemies while others can be used for non-violent activities. The player also has access to Force powers. These include projectile weapons such as a blaster or railgun, and the lightsaber.

The player has a choice of weapons to use throughout the game. Some non-hostile NPCs may help the player by attacking enemies. As well as including some enemies that featured in Dark Forces II, Mysteries of the Sith adds twenty new monsters, including a rancor. Within each level the player can encounter both hostile and non-hostile non-player characters (NPCs). The player progresses through the game in a linear fashion there are fourteen levels and each has set objectives that the player must complete before being able to continue to the next level. Unlike Dark Forces II, where the player's actions within the game dictate whether the story ends with the light side or the dark side ending, Mysteries of the Sith has a single, morally positive course.

Mysteries of the Sith is primarily a first-person shooter, but offers the choice of a third person view. See also: Gameplay of Star Wars Jedi Knight: Dark Forces II Single-player Mysteries of the Sith received mostly positive reviews from critics, with praise being given to the game's story and improvements to artificial intelligence. There are also technical improvements over Dark Forces II, including colored lighting, new textures and models, and improved artificial intelligence. The player controls Kyle Katarn, protagonist of Dark Forces II, and later in the game, Mara Jade, one of the most popular Star Wars Expanded Universe characters. The single-player story is set five years after the events of Dark Forces II. It was re-released onto Steam along with its predecessors and sequels. The multiplayer mode allows up to eight players to play online or over a network. The expansion includes a single-player mode and fifteen multiplayer maps. It was developed and published by LucasArts, and released on January 31, 1998. Star Wars Jedi Knight: Mysteries of the Sith is an expansion pack for the first person shooter Star Wars Jedi Knight: Dark Forces II.
