Well, that's it. Anyone knows all?
DooM, DooM2, Final DooM
Heretic
Hexen
Strife
HACX: You can download free here: <!-- m --><a class="postlink" href="http://www.sonic.net/~nostromo/hacx/GetHacx.html">http://www.sonic.net/~nostromo/hacx/GetHacx.html</a><!-- m -->
...
any more?