Definitions by WhiteDemon1280

Doom Clone 

Early 3D(-ish) FPS games that looked an played like Doom. A good example (and not a bad either) is Duke Nukem 3D.

Duke Nukem 3D can be considered a Doom Clone because the graphics and game play are similar to Doom.

Doom Clone by WhiteDemon1280 October 11, 2011