Star Wars: Dark Forces is a first-person shooter video game developed and published by LucasArts. It was released in 1995 for MS-DOS and Macintosh, and in 1996 for the PlayStation. The story is set in the fictional Star Wars expanded universe and begins shortly before the original Star Wars film, before flashing forward to a year after the film's events. The game's protagonist and playable character is Kyle Katarn, a mercenary working on behalf of the Rebel Alliance who discovers the Galactic Empire's secret Dark Trooper Project, which involves the development of a series of powerful new battle droids and power-armored stormtroopers. Dark Forces uses the Jedi game engine, which was developed specifically for the game. The engine adds gameplay features that were uncommon to the first-person shooter genre at the time of release, including level designs with multiple floors, and the ability to look up and down. Because of the two games' similarities, Dark Forces has often been called a Doom clone, though the latter lacked several technical features that Dark Forces introduced.