Omnicide is the premier zombie co-op and singleplayer modification for Battlefield 2 (A.K.A. BF2). This modification features an authentic zombie environment, with new and top-quality maps, weapons, skins, sounds, and chillingly authentic voice acting. In this modification you must think to survive and work with your teammates. It features two gamemodes: Survival, a new idea to BF2, where you and your comrades defend yourself until you are finally overcome by the zombies, and Escape, where you and your comrades fight to escape zombie hell. Give this mod a try, and you'll be amazed at what the Omnicide developers have done with Battlefield 2.
A more up-to date version of the M4