Heretic

DeuTex is a wad composer for Doom, Heretic, Hexen and Strife. It can be used to extract the lumps of a wad and save them as individual files. Conversely, it can also build a wad from separate files. When extracting a lump to a file, it does not just copy the raw data, it converts it to an... Platforms: *nix

Doomsday Engine is a 3D-graphics enhanced game engine for Doom, Heretic, and Hexen. The Doomsday Engine is an enhanced Doom source port, based on the source code of id Softwares Doom and Raven Softwares Heretic and Hexen. The purpose of the project is to create versions of Doom, Heretic and... Platforms: *nix

Vavoom project is a source port based on sources of Doom, Heretic, Hexen and a little bit from Quake. Supported platforms are DOS, Windows and Linux.. Platforms: *nix

Heretic is a first-person shoot-em-up game similar to the game play of Doom. This game is the prequel to Hexen which was released commercially for the Mac.Required: The Heretic WAD file is required to play the game. Place it in the same folder as the Heretic application. A music file is also... Platforms: Mac

Yadex project is a Doom/Doom II/Heretic level (wad) editor for X. Yadex is a Doom level (wad) editor for Unix systems running X, including Linux. It supports Doom alpha, Doom beta, Doom, Ultimate Doom, Final Doom, Doom II, Heretic and also, in a more or less limited way, Hexen and Strife. It is... Platforms: *nix

A portable game engine for classic first person shooters such as DOOM, Heretic and Hexen. Lets you enjoy the original games using modern technology, including high-resolution OpenGL graphics, 3D models, and dynamic lighting effects. Platforms: Windows, Mac, BSD, Linux

Ruin is a 2.5D Java game world that can run from a browser. It's like a 3D MUD. The game looks similar to Doom or Heretic. View the home page for a demo (http://ruinworld.sourceforge.net). Platforms: Windows, Mac, Linux

XQF is a game server browser and launcher for Unix/X11 for many popular games such as the Quake series, Unreal Tournament series, Half-Life etc. XQF is a front-end to QStat, a program by Steve Jankowski and uses the GTK+ toolkit. Features Supports Americas Army, BF1942(wine), Descent 3, Doom... Platforms: *nix