For the most part, Call of Duty: Modern Warfare 2 is no more controversial than any other war-based shooter. One particular level, however, managed to earn the game a place on this exclusive list. 'No Russian' allowed players to join a team of terrorists as they stormed a Russian Airport. With movement restricted to that of a casual walk, the game forced players to bear witness to the murder of hundreds of innocent civilians. Saying this, the player's character was in fact an undercover agent (a good guy), and you could complete the level without killing a single innocent person. You also had the option to skip the sequence entirely if you wanted to.