Red Orchestra. Probably the best WWII shooter ever. So realistic, and very immersive. Maps are awesomeme, too. You play as the Russians or Germans, which is unique compared to the other games focusing on the British and Americans. They released a mod for it recently, Darkest Hour, where you play from Normandy through to Germandy. It's amazing! It pretty cool to attach a bayonet and rush into the Ardennes Forrest in the Battle of the Bulge and just take the enemy up close and personal. Anywone else play this?