
Heretic
Heretic is a 1994 first-person shooter video game developed by Raven Software and published by id Software. It was distributed by GT Interactive for DOS.
Links
Media
Open-source clones (17)
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
Updated10 months ago
LicenseGPL2*
Release2015
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
Updated18 days ago
LicenseGPL-2.0
Release2009
Active

Crispy Doom is a limit-removing Doom source port with higher resolution, widescreen, and uncapped framerate, staying demo-compatible.
Platforms:WindowsLinuxOSX
Stars947
Updated17 days ago
LicenseGPL-2.0
Release2014
Sporadic

A portable, enhanced source port supporting Doom I/II, Heretic, and Hexen, built as cross-platform C++ libraries.
Platforms:WindowsLinuxOSX
Stars303
Updated3 months ago
LicenseUnknown
Release2011
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
Updated25 days ago
LicenseGPL-3.0
Release2021
Active
No preview
An advanced Doom-engine source port descended from SMMU, built with SDL2 and actively maintained across major platforms.
Platforms:WindowsOSX
Stars268
Updated19 days ago
LicenseGPL-3.0
Release2014
Active
No preview
GZDoom 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
Updated1 month ago
LicenseGPL-3.0
Release2013
Halted
No preview
Raven Software's official release of the Heretic source code, published for learning and modification; the DMX sound library is excluded.
Platforms:DOS
Stars54
Updated13 years ago
LicenseGPL-2.0
Release2013
Sporadic

HHeretic is a source port of Heretic for modern *nix systems, continuing Dan Olson's original Hacked Heretic project.
Platforms:Linux
Stars9
Updated10 months ago
LicenseGPL-2.0
Release2019
Sporadic

A pure Java source port of Doom, nearly complete but still missing network multiplayer.
Platforms:Linux
Stars217
Updated8 months ago
LicenseGPL-3.0
Release2015
Halted
Active
No preview
A client/server Doom source port for Internet multiplayer with up to 255 players and many competitive game modes.
Platforms:WindowsLinuxOSX
Stars294
Updated11 days ago
LicenseGPL-2.0
Release2015
Archived
Active
No preview
A modern GPLv3 source port continuing the ZDoom/GZDoom lineage for Doom, Heretic, and Hexen.
Platforms:WindowsLinuxOSX
Stars2,218
Updated12 days ago
LicenseUnknown
Release2025



