About

Small, functional and simple source port, created with help, efforts, and bits of code from people around the world. The project is based on Chocolate Doom and Crispy Doom, with significant additions from DOOM Retro.

Download

International Doom, version 8.2 (released: May 25, 2025)

• Windows (64-bit)
• Windows (32-bit)
• Linux AppImage (64-bit)

International Heretic, version 8.2 (released: May 25, 2025)

• Windows (64-bit)
• Windows (32-bit)
• Linux AppImage (64-bit)

International Hexen, version 8.2 (released: May 25, 2025)

• Windows (64-bit)
• Windows (32-bit)
• Linux AppImage (64-bit)

Source code is available on GitHub: https://github.com/JNechaevsky/international-doom/

Major features

• Optional True Color render.
• Up to 6× (1200p) rendering resolutions.
• Uncapped framerate.
• Additional, darker gamma-correction levels.
• Post-processing effects.
• Support for OPL2, OPL3, MIDI, Fluidsynth and GUS music playback.
• In-game keyboard and mouse bindings.
• Various visual, audible, physical and demo enhancements.
• Compatibility with vanilla-engine demos.
• Removed limitations of vanilla engine.
• Support for nodes in extended format (ZDBSP and DeePBSP).
• Support for BEX/DEHEXTRA DeHackEd extensions.

Compatibility

Gameplay features from “Physical” and “Compatibility-breaking” sections change game mechanics, making it no longer 100 % original. However, these features are optional and never active in multiplayer or demo recording/playing to provide maximum compatibility and prevent desyncs.

BOOM / MBF / MBF21 specifications are not supported.

Supported games

• Doom shareware, registered, The Ultimate Doom
• Doom II
• No Rest for the Living
• Final Doom
• SIGIL and SIGIL II
• Freedoom (Phase 1 and 2, FreeDM)
• Heretic
• Hexen

License

International Doom is Open Source and licensed under the GNU General Public License v2.