Doom95

Doom95 is an official source port of Doom to Win9x operating systems. This port was done by Microsoft itself to serve as a flagship for their DirectX technology, and was released on August 20, 1996. It supports four resolutions (320x200, 320x240, 648x400 and 640x480) and has a nice front end for playing multiplayer games and such. It does not have any additional feature over original Doom. Doom95 works with Doom, Ultimate Doom, Doom II and Final Doom. It does have cheat codes that are exclusive to it, such as the ability to kill all of the monsters in a level.