Doom
Doom is a 1993 first-person shooter game developed and published by id Software for MS-DOS. It is the first installment in the Doom franchise. The player assumes the role of a space marine, later unofficially referred to as Doomguy, fighting through hordes of undead humans and invading demons. The game begins on the moons of Mars and finishes in hell, with the player traversing each level to find its exit or defeat its final boss. It is an early example of 3D graphics in video games, and has enemies and objects as 2D images, a technique sometimes referred to as 2.5D graphics.
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Open-source clones (40)
Halted
id Software's original 1997 DOOM source code, released under GPL v2, powering the classic demon-hunting FPS on the UAC's Mars facility.
Platforms:LinuxDOS
Stars19,552
Updated2 years ago
LicenseGPL-2.0
Release2012
Active
Original game image
Original game imageGZDoom is a modder-friendly source port of the Doom engine covering Doom, Heretic, and Hexen, with OpenGL and Vulkan rendering support.
Platforms:WindowsLinux
Stars3,102
Updated3 months ago
LicenseGPL-3.0
Release2013
Active
A source port that reproduces the original DOS Doom, Heretic, Hexen, and Strife with their original bugs intact on modern systems.
Platforms:WindowsLinuxOSX
Stars2,416
Updated2 months ago
LicenseGPL-2.0
Release2009
ActiveOriginal game image
Original game imageA modern GPLv3 source port continuing the ZDoom/GZDoom lineage for Doom, Heretic, and Hexen.
Platforms:WindowsLinuxOSX
Stars2,218
Updated1 month ago
LicenseUnknown
Release2025
Active
A free replacement for Doom's levels, art, sounds, and music, requiring a separate Doom source port to actually run it.
Platforms:None
Stars1,343
Updated4 months ago
LicenseUnknown
Release2012
Halted
Active
DRL (DoomRL) is a free, open-source turn-based roguelike written in FreePascal, with code dating back to 2002.
Platforms:WindowsLinux
Stars1,179
Updated1 month ago
LicenseGPL-2.0
Release2016
HaltedOriginal game image
Original game imageThis is the archived 3DO port of DOOM by Rebecca Ann Heineman, using the 3DO's cell engine for walls and software-rendered floors.
Platforms:3DO
Stars1,172
Updated3 years ago
LicenseMIT
Release2014
Active
Crispy Doom is a limit-removing Doom source port with higher resolution, widescreen, and uncapped framerate, staying demo-compatible.
Platforms:WindowsLinuxOSX
Stars947
Updated2 months ago
LicenseGPL-2.0
Release2014
Active
SLADE3 is an all-in-one editor for Doom-engine games, merging the older SLumpEd and SLADE map-editing tools into one program.
Platforms:WindowsLinuxOSX
Stars868
Updated2 months ago
LicenseGPL-2.0
Release2012
Active
DOOM Retro is a Windows Doom source port by Brad Harding since 2013, aiming for a dark, gritty, pixelated take on the classic game.
Platforms:Windows
Stars771
Updated1 month ago
LicenseGPL-3.0
Release2013
Active
A performance-focused, from-scratch Doom source port using static rendering to run complex modern maps well on any hardware.
Platforms:WindowsLinux
Stars570
Updated1 month ago
LicenseGPL-3.0
Release2019
SporadicOriginal game image
Original game imageA reverse-engineered PC backport of PlayStation Doom and Final Doom, with an optional Vulkan renderer for widescreen.
Platforms:WindowsLinuxOSX
Stars542
Updated1 year ago
LicenseGPL-3.0
Release2019
HaltedOriginal game image
Original game imageid Software's free GPL source-code release of DOOM Classic for iOS, not including any game data, which remains under the original EULA.
Platforms:iOS
Stars339
Updated10 years ago
LicenseGPL-2.0
Release2014
ActiveOriginal game image
Original game imageA modern continuation of Lee Killough's MBF Doom source port, adding widescreen rendering, uncapped framerate, and gamepad support.
Platforms:WindowsLinux
Stars326
Updated1 month ago
LicenseGPL-2.0
Release2016
Sporadic
A portable, enhanced source port supporting Doom I/II, Heretic, and Hexen, built as cross-platform C++ libraries.
Platforms:WindowsLinuxOSX
Stars303
Updated5 months ago
LicenseUnknown
Release2011
Archived
Sporadic
A Game Boy Advance port of prBoom supporting Doom's IWADs, with variable framerate and no multiplayer or demo support.
Platforms:GBA
Stars297
Updated1 year ago
LicenseUnknown
Release2019
ActiveOriginal game image
Original game imageA client/server Doom source port for Internet multiplayer with up to 255 players and many competitive game modes.
Platforms:WindowsLinuxOSX
Stars294
Updated1 month ago
LicenseGPL-2.0
Release2015
ActiveOriginal game image
Original game imageAn advanced Doom-engine source port descended from SMMU, built with SDL2 and actively maintained across major platforms.
Platforms:WindowsOSX
Stars268
Updated2 months ago
LicenseGPL-3.0
Release2014
Active
A community source port enhancing Ultimate DOOM, DOOM II, and DOOM 3, requiring a legally owned copy of DOOM 3 BFG Edition.
Platforms:Windows
Stars264
Updated1 month ago
LicenseGPL-3.0
Release2017
Sporadic
A pure Java source port of Doom, nearly complete but still missing network multiplayer.
Platforms:Linux
Stars217
Updated10 months ago
LicenseGPL-3.0
Release2015
Sporadic
cssDOOM recreates Doom's 3D rendering entirely with styled DOM elements and CSS transforms, instead of canvas or WebGL.
Platforms:Web
Stars206
Updated4 months ago
LicenseGPL-2.0
Release2026
Active
A Doom source port reviving the older EDGE 1.35 engine with modern visuals, easy modding, and support for Heretic and other IWADs.
Platforms:Windows
Stars101
Updated2 months ago
LicenseGPL-3.0
Release2021
HaltedOriginal game image
Original game imageA port of Doom to the Nintendo 64 via the libdragon toolchain, built from id Software's original source release; now marked halted.
Platforms:N64
Stars98
Updated2 years ago
LicenseUnknown
Release2015
Sporadic
3DGE is an advanced OpenGL source port built on the id Tech 1 engine, aimed at modders wanting an easy platform for new content.
Platforms:WindowsLinuxOSX
Stars82
Updated11 months ago
LicenseGPL2*
Release2015
Halted
A remaster of the 3DO version of DOOM for Windows, macOS and Linux, based on its official source release.
Platforms:WindowsLinuxOSX
Stars80
Updated6 years ago
LicenseMIT
Release2019
Halted
Iron Doom is a Doom source port written in Rust on the Chocolate Doom codebase, using Bevy's ECS to fix engine bugs.
Platforms:WindowsLinuxOSX
Stars59
Updated1 year ago
LicenseGPL-3.0
Release2024
SporadicOriginal game image
Original game imageA cross-platform, modernized ZDoom fork for Doom, fully wad/mod-compatible, using FMOD Studio audio and software rendering.
Platforms:WindowsLinuxOSX
Stars23
Updated8 months ago
LicenseGPL-2.0
Release2024
Halted
A modification of the MBF Doom source port that adds the fan-made Sigil and Sigil II episodes, targeting DOS.
Platforms:DOS
Stars22
Updated2 years ago
LicenseGPL-2.0
Release2019
HaltedOriginal game image
Original game imageTargets Sega Dreamcast, though its README is actually the original 1998 WinDoom documentation, not Dreamcast-specific notes.
Platforms:Dreamcast
Stars16
Updated4 years ago
LicenseUnknown
Release2022
Halted
glDoom Resurrected continues Bruce Lewis's original OpenGL Doom source port, adding fixes, an SDL2 backend, and Windows/Linux builds.
Platforms:WindowsLinux
Stars9
Updated1 year ago
LicenseUnknown
Release2022
SporadicOriginal game image
Original game imageThe Linux Doom source converted to SDL3 and 64-bit, with no other changes, for macOS, Linux and Windows.
Platforms:WindowsLinuxOSX
Stars4
Updated8 months ago
LicenseMIT
Release2025
