This page is for the original game. For the 2016 game, see Doom (2016).
The Ultimate Doom is an updated version of the original Doom that features a new fourth episode, Thy Flesh Consumed. All digital distribution releases carry The Ultimate Doom.
A list of all alpha, beta, and shareware versions of the game can be found at Doomworld Shareware section. Details about each alpha and beta release can be found both on The Page of Doom and the Doom Wiki. Note that the .WAD files available in the alphas and beta are not compatible with any Doom source port.
All patches for the retail versions of Doom (as well as Doom II: Hell on Earth and Final Doom) can be found here. The retail versions of the original Doom can be upgraded to The Ultimate Doom through patches.
When using the keyboard and mouse configuration in Doom or similar games on DOS or through DOSBox, vertical mouse movement causes the player to move forward and back, which can make mouse aiming difficult. novert is a DOS TSR that disables vertical mouse movement to prevent unnecessary player movement.
MOUNT C "."
DOOM.EXE -config MOUSE.CFG
Since the release of the source code, several modified engines have emerged.
You can view a more exhaustive list on Wikipedia or a set of comparison tables on DoomWiki.org. The history of various source ports is examined on Doomworld. Latest Git builds of ZDoom, GZDoom, QZDoom, and Odamex are available at DRD Team Development Builds.
If using a source port, it is recommended to use any of these following launchest to easily load the WADs or PK3 files, change their loading order, add the command lines or even set up the starting level. Some of these even allows you to save the list of mods you have added.
If using the GZDoom or QZDoom source ports, you can use JP LeBreton's WadSmoosh tool to combine any of the official DOS-era Doom games' IWADs (Doom, Doom II: Hell on Earth, Master Levels for Doom II, and Final Doom) that you own, as well as the No Rest for the Living IWAD from Doom 3: BFG Edition, into a single PK3 IWAD with each game selectable as episodes. The tool along with a guide to use it can be found here.
A freely redistributable replacement of Doom-like assets is available at Freedoom, forming a completely free and open source game. Art assets from the original game such as the levels, sounds, textures, etc., remain under copyright. They can be purchased from Steam, GOG.com, or copied from an original game disc.
ZDoom seeks to support multiple monitors out of the box since version 2.5.0. Widescreen Gaming Forum discusses multi-monitor set ups with GZDoom.
The oldest versions of Doom supported multi-monitor by having a network of three computers, used to expand the field of view. The three clients needed to be launched with the following parameters: doom -devparm -net 3 -left, doom -devparm -net 3, and doom -devparm -net 3 -right.
doom -devparm -net 3 -left
doom -devparm -net 3
doom -devparm -net 3 -right
Depending on your choice of engine, you can usually change the field of view with a console command, or even in the options. Try fov <1-179> or gr_fov <1-179>.
Borderless Gaming has been tested to work with the following source ports:
Run the program as administrator