DOOM was one of the most radical PC games ever, it departed from the flat 2d based games and simplistic polygon based titles (Wolfenstein 3D was it's precursor) and introduced fast, textured 3d, multiplayer and violent gameplay.
The Linux version of Doom is identical to that of the original Dos based one, though it may run about 5-10% slower due to the increased memory and CPU useage of Linux as compared to Dos.
 
 
 
 
 
 
 
These web pages designed by J.Snowdon 1998.  Some images taken from other sources.