Hidden Multiplayer Gem...
However where this game really shines is the multiplayer. Just look at the single player mode as training for multiplayer. Multiplayer has 4 different modes, coop, rapid deployment, Barricaded Suspects (deathmatch), and Vip escort.
It is the VIP escort mode that really shines out of these modes. It requires high level teamwork and intelligent play to succeed. When you get shot you die, there is no energy or health, you have armour and you can take maybe a couple bullets to the well protected parts of your body but thats it. This makes the game very realistic.
I really recommend anyone trying the multiplayer in this game, despite it being 4 years old now it is still in my opinion the best multiplayer game there is. Forget COD 4 this is much better, much more precise, much more of a team game, less forgiving for sure but that adds an edge of realism to the game.
Get this game and try the multiplayer vip escort mode, you won't regret it. There are hundreds of good servers and you can play using a cracked version of the game.