From the Linux Game
Tome:
“A Linux port of Raven Software’s popular doom-engine game”
“Just days after the source code was released, we’ve already got
a working port of Heretic.”
“Heretic is a first person shooter with a fantasy theme, based
on the Doom engine. This port runs with either X or the GGI
library. As of this writing, sound and network support are
broken.”