First time you play it, you can't help but get the occasional goosebump..
From the opening scenes to the final level, you never know what to expect. Sometimes it's bad guys coming straight at you, to sounds, to visuals just on the edge of your peripheral vision. How a person has to enjoy this game to the fullest, is immerse themselves in the game, put on the headset, get rid of all outside distractions, and just enjoy the ride. For those that can't just enjoy the experiance, this game won't be for you, and will explain some reviewers comment on the "non-suspense" experience.
The AI is HIGHLY intelligent, which make some very fierce, and fun firefights, where you are once again immersed into the game. The cut scenes are a part of the story, and never annoying, and you never truly "leave" the game.
A negative to the game is that it is quite linear, you are lead to where you need to go, which is good sometimes, but may question the re-playability of the game. Another negative, is that quite a few of us have been spoiled by the Half-Life game engine, and not all the props and surroundings are effected by bullets, and other collateral damage. I found this quite annoying when using weapons, and the shot gun range does become questionable as you can't really judge where or what your hitting.
The soundtrack is amazing, and quite easily could have been made for a movie. I look forward to seeing a live action movie, as it could quite easily done. Not to production teams, use the music over and over.........
This game is a must buy, as it is very, very enjoyable, and quite open for sequels/expansion packs. A great story, a great idea, and very fun.