Doom and Doom 2 were already running on MS-DOS, but Microsoft proposed porting the games to DirectX to run on Windows 95. That’s how Doom 95 became the first DirectX game. Later on, Microsoft ...

FreeDOS is an open-source recreation of MS-DOS, capable of running ... of Microsoft Word, Fallout, DOOM, The Secret of Monkey Island, SimCity, and Lotus 1-2-3. FreeDOS helps keep those decades ...