Campaign Co-Op is a game mode in Call of Duty: World at War. Unlike Competitive Co-Op, players don't compete for points. Instead it allows the player to cooperatively play with friends or randoms online to complete campaign levels. Players can start at the first level or any level that has already been completed in single player campaign mode. Progress in co-op campaign mode will not unlock levels. Vendetta and Black Cats are unavailable in this game mode.