Although Call of Duty's single player has always been a mainstay of the franchise, the multiplayer is certainly something to write home about. Our source has said that there have been multiplayer bouts with 54 players. PC gamers will be happy to know that they will be able to join the action once again, as Infinity Ward is supposed to be bringing Call of Duty 4 to the PC as well as consoles. Call of Duty 3 is only available on consoles and eventually the PSP.