Call of Duty: United Offensive had many improvements, it had a bomber mission where you have to protect a British B-17 and open the bomb bay doors. It has new orchestra music, which is first heard in the opening clip. It has an adition of several awesome vehciles like the Elefant Heavy Tank, the SU-152 Heavy Tank, M4 Sherman Tank and many different aircraft like the Yak-9, P-48, Me-109, He-111, B-17, Spitfire and from the old Call of Duty, Stuka. Since it is the Battle of the Bulge, you do not see any C-47's like in the old one. It also has the adition of LMG, new HMG, and cool other weapons like the Gewehr 43, the SVT-40 and the Panzerschrek. In Multiplayer, it has a rank system, which is based on the tens of people you kills. Theres also a new mode called Base Assault where tank have to bombard a bunker and then infantry storm the place and set explosives. I give this game a 9.0!