The game takes place both before and after the events of Star Wars: A New Hope, and is played in the person of Kyle Katarn, a mercenary for hire. He is contacted by the Rebellion to stop a project from the Empire called the "Dark Trooper".
Often labeled a "Doom clone", it is believed that Dark Forces was created to counter the many unofficial Star Wars-themed WADs for Doom, and rumored that LucasArts reverse-engineered the Doom engine to find out how to build their own. The Dark Forces engine was in the end more advanced than the Doom engine, containing features such as rooms over rooms, polygonal objects, and the ability to look up and down.
Jerec and Sariss took the time to give all their fellow Dark Jedi cronies a crash course in the teachings of the DarkForce, the religion of the true Prophets of the Dark Side (not to be confused with the Imperial Center-backed mockery, the Church of the Dark Side).
The DarkForce is the faith of the Prophets of the Dark Side (not to be confused with a group of wannabes who call Space Station Scardia home).
The DarkForce religion was brought to Dromund Kaas by the Sith apprentice Darth Millennial.
Although there is no lightsaber in DarkForces (since Kyle Katarn was not a Jedi yet), much discussion over the lightsaber may have shifted the direction of the sequel to chronicle Katarn's rise as a Jedi.
The developers of DarkForces originally considered releasing the title on floppy disks since the game was developed during the game medium transition period of floppy disks to CD-ROM.
DarkForces was the 11th best selling computer game of the period 1993 to 1999, with 952,000 copies.