This is one of the few games you actually feel like you're living it. Amazing and creative game.
The story immediately drew me in. It is an amazingly creative setting and story. The sounds, environments, and characters all seem to really exist in this game. I was immersed in the game in a matter of minutes and all I wanted to do was continue. Even though I am not big on first-person shooters on consoles, it seemed to flow well and was rather forgiving in accuracy of shooting.
This is, without a doubt, one of the best games I have ever played (and I have played A LOT). Whether you like FPS games or not, try this game immediately.
Parental discretion is definitely advised though, this WILL give children nightmares.