This expansion added exactly what the original needed.

User Rating: 8.1 | Call of Duty: United Offensive PC
I'm a multiplayer gamer, so any improvements upon the original multiplayer modes are a plus.

You're no longer running around expecting heavy sniper fire. Now, you're running around expecting the loud roar of a tank shell to rip you apart. Oh - and of course if the tanks don't get you, I'm sure the snipers will. Welcome to United Offensive.

To keep it short and sweet: United Offensive added vehicles, sprinting, and larger maps (amongst other things). The main addition which most people would point out, would of course be vehicles. Who doesn't enjoy driving a jeep in game, speeding past a Sherman, evading death by means of speed? Who doesn't enjoy (in the same light) blowing up a jeep full of marines?

Vehicles impact gameplay enormously. A single tank can keep the opposing team from advancing or capturing your flag. Most players understand this concept and surprisingly enough, you'll find many troops going on suicide runs in order to rebalance the gameplay. On the other hand, sometimes the opposing team is more then willing to keep their single asset safe.