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Doom 1.0 in a DOSBox

Doom, written by the ever popular iD software, was released December 10th, 1993 and was one of the most influential video games of its time. It pushed PC hardware to the limits, and forced many to upgrade to the latest 486 CPU, and VL video cards.

Doom was written in C, on the NeXTSTEP Operating system, and ported to MS-DOS with the Watcom C compiler. It was built as a DPMI executable not only demanding protected mode, but also a 32bit cpu. Many see the rise of Doom leading to the subsequent rise of Windows 95 as any machine that could run Doom acceptable could run Windows 95.

Being written in C allowed for the game to be ported to various operating systems. Doom quickly found itself of many 32bit machines of the time, and is used by many people as a porting exercise.

Doom was also ported to Silicon Graphics (SGI) by Dave Taylor of iD software in 1994. It ran on IRIX 5.2 (and later). The first port was based on the (at the time unreleased) MS-DOS version 1.5, and later on 1.6 and 1.8.


  • NeXT
  • MS-DOS
  • Windows
  • Solaris
  • IRIX
  • Linux


  • Sega 32x
  • Atari Jaguar
  • Sony Playstation
  • 3DO
  • Sega Saturn
  • Super Nintendo
  • Nintendo 64
  • Game Boy Advanced
  • Xbox
  • Xbox 360
  • Sony Playstation 3


Doom spawned several versions including:

Doom 1

This was the original Doom. There has been several beta versions released which can be found here:

IWAD sizes

The easiest way to determine which version of Doom you have is to consult the following table

10396254 doom-registered-1.1/doom.wad
10399316 doom-registered-1.2/doom.wad
11159840 doom-registered-1.666/doom.wad
11159840 doom-registered-1.9/doom.wad
4207819 doom-shareware-1.0/doom1.wad
4274218 doom-shareware-1.1/doom1.wad
4225504 doom-shareware-1.2/doom1.wad
4261144 doom-shareware-1.4/doom1.wad
4271324 doom-shareware-1.5/doom1.wad
4234124 doom-shareware-1.666/doom1.wad
4211660 doom-shareware-1.6/doom1.wad
4196020 doom-shareware-1.8/doom1.wad
4196020 doom-shareware-1.9/doom1.wad

Other languages: I've found a Japanese version of Doom for the PC98, the IWAD is 1.2

Doom 2

Doom II, hell on earth was released on October 10th, 1994


14943400 doom2-1.666/doom2.wad
14612688 doom2-1.7a/doom2.wad
14604584 doom2-1.9/doom2.wad


The engine from Doom was then licensed to various people and was sold with the following games:



Chex Quest

In 1996, Digital Café was tapped to create a computer game tie in for Chex. They licensed the DOOM engine (Around the time of Ultimate Doom), and released Chex Quest.

Going free

The source code to the Doom engine was then released under the GPL. You can download it from iD's main site. Or better google for

After building Doom for the UnixWare OS, I've found that you must define NORMALINUX, otherwise the resulting exe seems not to run correctly, as I found out building for UnixWare.

Additionally I've also rebuilt the first MS-DOS backport of DOOM that relied on DJGPP. You can find my post here, along with some idea of how to compile it.