Enhanced OpenGL port of the official DOOM source code that also supports
Heretic, Hexen, and Strife.

This is the latest version of gzdoom, which may not run well on
older/slower systems. If gzdoom does't run smoothly on your system,
try installing gzdoom-legacy instead. Note that gzdoom and gzdoom-legacy
conflict: only install one or the other.

See README_SBo.txt for optional runtime dependencies.
