Doom95 is an official port of Doom to windows 95, and is included in many later releases of The Ultimate Doom, Doom II, and Final Doom.
This port was developed by a team at Microsoft headed by Alex St. John, the creator of the DirectX specification. It was to serve as a flagship for the new technology,
and was initially released as a preview on the Games for Windows 95 CD released in November 1995 by Microsoft, with a full release following on August 20, 1996.
Differences
Unlike the later DOS versions of the Doom games, Doom95 cannot play back true MIDIs, only real MUS files.
The engine supports a larger amount of sound channels, with a maximum of 32, whereas vanilla supports only eight.
The sound effects are played back at a slightly lower pitch than in regular Doom played under DOS.
Depending on the resolution chosen, less of the player's weapon is shown on screen when compared to the MS-DOS version.
Some of Doom95's quit messages differ slightly from vanilla Doom, mostly by removing references to DOS.
The port handles its configuration differently from the DOS version, which in turn disables the always run trick.