Amazing game! It’s Stephen King meets Half-life 2.
The game also has a “Slowmo” function that is very similar to the Max Payne slowmo. This function gives another dimension to the game because it allows the level designer to setup impossible combat situations which raises the challenge bar. Another interesting exception to the game is the 3 weapon limitation. You can only carry 3 weapons at a time. Since there isn’t any ammo, once a weapon is empty, you just throw it away and pickup another one. It also forces you to decide on your arsenal. I had a hard time deciding between a sniper gun and a rocket launcher at some point. There is also a hand to hand combat available but I hardly ever used it.
The only downside is that I found the game a tad too easy. I played at the highest difficulty setting and hardly had instances where I had to reload my saved games more than once to go though a tough spot. Even then, I hardly died. I think I may have spent 30 hours to go through the whole game which isn’t bad for a single player game.
I wouldn’t call this game revolutionary but it definitively is one of the best FPS of the year. If you liked Half-life 2, you will love this game.
PS: I didn’t try the multiplayer function; I’m too busy in BF2. I bought this game for the single player game. So I don’t know about this part.