It's Call of Duty – you know it, you love it. Treyarch does an excellent job of expanding the engine from 4 and returns to World War Two without falling prey to overly rehashing the other games. The addition of co-op mode and a fun, unlockable zombie game make up enough quirk to make World at War stand out from previous installments. Finally visiting the Pacific front introduces a greater maturity and brutal depth than any of the other WWII CODs. -