PrBoom is a cross-platform version of the classic 3D first person shooter Doom from id Software. Originally written for win32 (MS Windows), PrBoom has since been ported to Linux and many other platforms. It offers a number of enhancements over the original game, including OpenGL rendering and high video resolutions, while attempting to remain true to the original Doom in terms of play.
PrBoom is available from the standard repos:
# pacman -S prboom