Doom | Play Online for Free | 1993 MS-DOS Game | …
Doom's source code was released in 1997. This spawned even more adaptations, due to fans porting the code to an array of other devices. The games technology engine was surpassed in the mid-90s, and the popularity of the game tailed off. However, the franchise again received popular attention in 2004 with the release of Doom 3.