From PCGamingWiki, the wiki about fixing PC games
Doom cover
id Software
Mac OS Lion Entertainment, Inc.
Linux Dave Taylor
GT Interactive
id Software
id Tech 1
Release dates
DOS December 10, 1993
Mac OS December 10, 1993
Linux 1994
Windows August 20, 1996
Doom 1993
Doom II: Hell on Earth 1994
Final Doom 1996
Doom 3 2004
Doom 64 EX 2011
Doom 3: BFG Edition 2012
Doom (2016) 2016

This page is for the original game. For the 2016 game, see Doom (2016).

Key points

Runs on very low-end hardware.
The engine was made open source in 1997, making the game very mod-friendly.[1]

General information

Doom Wiki
Doomworld — A major fansite for the series Community Discussions for game series Support Page
Steam Community Discussions
Steam Users' Forums for game series


Source DRM Notes Keys OS
Retail Regular or The Ultimate Doom. DOS
GamersGate The Ultimate Doom. Pre-configured to run with DOSBox v0.74 (included in download).
Humble Store
Steam The Ultimate Doom. Pre-configured to run with DOSBox v0.72 (included in download). Can be played without Steam.
A shareware episode is also available (comes with the first episode, "Knee-Deep in the Dead").
The shareware IWAD can be downloaded separately from the main release (to be used with source ports).

Version differences[edit]

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.

Alpha and Beta releases[edit]

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.

Essential improvements[edit]


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.

Automating novert in DOSBox[2]

This will automate the process of running novert for digital releases of Doom or similar games when using DOSBox.

  1. Download novert from Doomworld here, then extract the file to <path-to-game>.
  2. Open the *.conf file that launches the game in DOSBox with a text editor (e.g. Notepad, Notepad++), search for the [Autoexec] section, then add the command above the line that executes the game.
  3. Save the changes in the *.conf file and then run the game. You should be to use the mouse to aim without moving forward and back. An example of this command can be seen below:

Source ports[edit]

Since the release of the source code, several modified engines have emerged.

Name Notes Renderer
ZDoom Limit-removing source port that has features such as high resolutions and all-new editing features for modders. Most mods are designed around ZDoom's features. Uses a software renderer which could cause some incompatibility issues with mods that use special effects reliant on OpenGL like Brutal Doom. Software
GZDoom Based on the same code as ZDoom, except it uses an OpenGL renderer. Nearly every mod should work with GZDoom, specifically ones that use special effects. OpenGL
Zandronum Based off modified ZDoom code. Use this source port if you want to play multiplayer, as it significantly overhauls the netcode from ZDoom. Basic mods that change the maps are fully supported, but more complex mods such as Brutal Doom varies. Check to see if the mod supports Zandronum or if there's a separate version that does. Software, OpenGL
Odamex Source port based on ZDoom 1.22 (and parts of 1.23) that focuses on multiplayer while staying close to the original Doom. Not as widely used as Zandronum. Unknown
PrBoom Source port based off Boom (a source port that was made by TeamTNT) that uses an OpenGL renderer that supports high resolutions. OpenGL
PrBoom+ Based off PrBoom that attempts to extend the port with more features. Software, OpenGL
Chocolate Doom Source port that aims to accurately reproduce the experience of playing vanilla Doom. Renders at a low-resolution (that's upscaled to higher resolutions) and purposefully keeps the original game's limits. Software
Doom Retro Source port based off Chocolate Doom that supports vanilla, limit-removing and Boom-compatible maps and makes a few other changes/fixes for the modern age while still keeping the classic Doom experience. Software w/ hardware acceleration, Direct3D, OpenGL

You can view a more exhaustive list on Wikipedia or a set of comparison tables on The history of various source ports is examined on Doomworld. SVN builds of ZDoom, GZDoom, and Odamex are available at DRD Team Development Builds.

Super Shotgun Launcher[edit]

If using a source port, you can use this launcher to load up custom WADs/PK3s in the ZDoom, GZDoom, and Zandronum source ports without needing to drag and drop or using command-lines. The launcher also has the extra functionality with launching Doom 64 EX, the DoomRPG mod, and also the OBLIGE Level Maker. The launcher can be downloaded 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,, or copied from an original game disc.

Game data[edit]

Configuration file and save game data location[edit]

System Location
DOS <path-to-game>\DOOMDATA\
Windows <path-to-game>\Utimate Doom for Windows 95\
Steam <path-to-game>\Ultimate Doom\base\
Mac OS
C:\DOOMDATA is used if running v1.1 or from CD; C:\DOOM_SE is used if The Ultimate Doom is installed from CD.
It's unknown whether this game follows the XDG Base Directory Specification on Linux. Please fill in this information.

Save game cloud syncing[edit]

System Native Notes
Steam Cloud

Video settings[edit]

In-game options menu.
In-game options menu.
Graphics option Option WSGF Notes
Widescreen resolution
Removed in v1.2.
A source port is required. See Source ports.
When using the GZDoom port. See Multi-monitor.
Field of view (FOV)
See Field of view (FOV).
Toggle with Alt+ Enter in DOSBox or its source ports, if supported.
Borderless fullscreen windowed
A source port and Borderless Gaming is required.[3] See Borderless fullscreen windowed.
Anisotropic filtering (AF)
A source port is required. See Source ports.
Anti-aliasing (AA)
A source port is required. See Source ports.
Vertical sync (Vsync)
A source port is required. See Source ports.
60 FPS
Capped at 35 FPS;[4] for 60+ FPS see Source ports.
120+ FPS
See Source ports.


ZDoom seeks to support multiple monitors out of the box since version 2.5.0. Widescreen Gaming Forum discusses multimonitor 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.[5]

Field of view (FOV)[edit]

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 fullscreen windowed[edit]

Borderless Gaming has been tested to work with the following source ports:

  • PrBoom+
  • ZDoom and its derivatives; Auto-Maximize is required for the image to display properly for non-SVN builds.[6]

Input settings[edit]

Keyboard and mouse Native Notes
Keys can be remapped for the DOS version with the SETUP.EXE program. A source port offers broader support for key remapping.
Mouse acceleration
A source port is required. See Source ports.
Mouse sensitivity
Mouse sensitivity in the DOS version in the in-game options menu. Source ports also provides mouse sensitivity options.
Mouse input in menus
A source port is required. See Source ports.
Mouse Y-axis inversion
A source port is required. See Source ports.
Controller support
Full controller support
ZDoom, as well it's derivatives, and Doom Retro features full controller support.
Controller remapping
Limited to only remapping Fire, Use, Sprint, and Strafe in the DOS version. Some source ports feature broader controller remapping options. See Source ports.
Controller sensitivity
False for the DOS version. Some source ports have adjustable analog stick sensitivity settings. ZDoom and its derivatives also support XInput trigger sensitivity settings.
Controller Y-axis inversion
A source port is required. See Source ports.
Additional information
Button prompts Input settings icon - Generic Controller.svg DOS version references buttons by numbers. ZDoom and Doom Retro references XInput controllers with Xbox notations.
Controller hotplugging
False for the DOS version, however ZDoom and Doom Retro supports hotplugging.
Haptic feedback
Doom Retro features vibration for XInput controllers.

Audio settings[edit]

Audio options Native Notes
Separate volume controls
Sound Effects, Music
Surround sound
A source port is required. See Source ports.
No spoken dialogue.
Closed captions
Only pickups sounds have linked messages.
Mute on focus lost
A source port is required. See Source ports.
EAX support
A3D 3.0 and EAX 2.0 can be used in the jDoom port[7][8] (A3D support discontinued since version 1.7.0)[9]
A3D can be hacked in the WinDoom port through IAS[10]


Language UI Audio CC Notes


Multiplayer types

Type Native Players Notes
Local play
Use Doom Legacy.
LAN play
4 Co-op, Versus
Online play
4 Co-op, Versus
A source port is recommended for online play as it adds modern networking support and simplifies the process of finding games. Most major source ports (like Zandronum) also increase the max player limit (for Zandronum, the limit is 64)

Connection types

Type Native Notes
Requires source port.
Direct IP
Possible in source ports.


Protocol Port(s) and/or port range(s)
TCP (outbound) 666
UDP (outbound) 666
These are the ports used by the vanilla game (no source ports). The ports to forward for each source port will vary
It is highly recommended to not forward these ports without good reason! Some malware use these ports as an entry point into a system.[11]

VR support[edit]

Headsets Native Notes
HTC Vive
Oculus Rift
Use Doomsday or GZ3Doom.

Issues fixed[edit]

Game does not run in DOSBox (Steam)[edit]

Disable double-buffering in DOSBox[12][13]
  1. Open ultimate.conf with a text editor such as Notepad or similar program.
  2. Under the section [sdl], look for the line fulldouble= and set it to false.
  3. Saves the changes made to the file.
  4. Repeat Steps 1-3 for the ultimatem.conf file.
  5. Launch the game. It should be able to boot properly in fullscreen.

Doom95 doesn't start on Windows 7[edit]

Apply necessary fixes and Doom95 XP Mouse Patch[14][15]
  1. Apply a palette fix (see Rainbow color problems in older games).
  2. Right-click the DOOM95.exe file, click Properties, go to the Compatibility tab, then set it to Windows 95 compatibility mode and check Run the program as administrator option.
  3. Go to %WINDIR%\SysWOW64, copy dplayx.dll and paste it into <path-to-game>, then rename the copied file to dplay.dll.
  4. Now download the Doom95 XP Mouse Patch and extract it to <path-to-game> folder.
  5. Run the program; at the end of the page, click the install button.
  6. Use the Configure button to disable Vertical Axis to prevent moving forward with the mouse; smooth the mouse and add parameters if desired.
  7. Now run DOOM95.exe, go to Advanced/Screen Resolution and set it to the highest resolution available.

Other information[edit]


Technical specs Supported Notes
Direct3D Various A source port is required. See Source ports.
DirectDraw 2 Doom 95 only.
OpenGL Various A source port is required. See Source ports.
Software renderer
DOS video modes VGA
64-bit executable
A source port is required. See Source ports.

System requirements[edit]

Minimum Recommended
Operating system (OS) MS-DOS 6.2
Processor (CPU) Intel 386 Processor Intel 486 Processor
System memory (RAM) 4 MB 8 MB
Hard disk drive (HDD) 100 MB
Video card (GPU) VGA graphics card


  1. id-Software/DOOM: DOOM Open Source Release
  2. Steam Community :: Guide :: Doom 2 Disable Vertical Mouse Movement - last accessed on August 4, 2016
  3. Verified by User:AmethystViper on April 25, 2016
  4. VOGONS • View topic - Doom in DOS: Original vs Source Ports
  5. Official DOOM FAQ, section 9.2
  6. Verified by User:AmethystViper on October 18, 2016
    Stable builds of ZDoom and GZDoom didn't render correctly without Auto-Maximize enabled in Borderless Gaming, but the newer SVN builds did not have this problem.
  7. JDoom + SBLive! + a3dapi.dll support file = INCREDIBLE! - New Doom Forums
  8. About: The Doomsday Engine - Doomsday HQ (retrieved)
  9. Doomsday Version History - Doomsday HQ (retrieved)
  10. IAS Doom Port - Extreme Audio Reality
  11. SANS Institute - Intrusion Detection FAQ: What port numbers do well-known trojan horses use?
  12. Steam Community :: Guide :: How to get DOOM to work on Windows 8 without downloading any sourcecodes or mods - last accessed on August 4, 2016
  13. Verified by User:AmethystViper on August 4, 2016
    Have tested using Windows 95 compatibility on the game's executable when using DOSBox, which did not stop the freezing issue until disabling double-buffering within DOSBox under Windows 7 and 8.1.
  14. Doomworld Forums - Doom95 mouse patch for XP available now - last accessed on August 4, 2016
  15. How to run Doom95 on Windows Vista/7 - The Doom Wiki at - last accessed on August 4, 2016