gzdoom (OpenGL port of DOOM) 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.