ZDoom is an enhanced source port of ID Software's DOOM engine. It is based on
the source code of id Software's DOOM. ZDoom boasts enhanced modding support,
as well as support for the following games:

* Ultimate Doom
* Doom II
* Final Doom
* Heretic
* Hexen
* Strife
* Chex Quest (1 & 3)
* Action Doom II
* Harmony v1.1
* Hacx
* The Adventures of Square