We're collecting a list of useful and interesting add-on software for Heretic II for Linux. If you know of other third-party additions for Heretic II, be sure to let us know.

Multiplayer Map Pack

Mirrors
3D Downloads/Linuxgames
http://www.3ddownloads.com/index.html?directory=/linuxgames/loki/extras/heretic2/
Ultimate Animanga
ftp://snuffleupagus.animearchive.org/loki/extras/heretic2/
Tux.org
ftp://boudicca.tux.org/misc/lokigames/extras/heretic2/

Quest 2.4

http://quest-ed.sourceforge.net/ - A map editor which supports all three Quake-series engines (and Heretic 2), Quest, has been released by Alexander Malmberg.