Overall great game.
Campaign mode has one major flaw: spawning. Enemies spawn in the most undesirable of places, take for example, you're in a turrent. An enemy paratrooper could unknowingly land directly behind you and shoot you in the back. Or you clear out a whole area and enemy troops appear out of nowhere. This can become very irritating. Negatives aside, one of the great features of this game is "hot-swapping". It allows you to instantly take control of any of your soldiers at the press of a button. It makes the game a whole lot cooler.
But where this game really excels, is online. This game was made for it. A player can choose from different locations, vehicles and soldier kits to use and that makes for some really intense online battles.
I really recommend this game to anyone who has a PS2.