An awe inspiring experience.
The most relaxing "game" you could ever play, it's soo different and alternative to the mindless gaming elsewhere.
If you care about the environment and the world around you, you couldn't fail to like this.
Bare in mind that I consider Resident Evil 4 on the Gamecube to be a gaming classic, I can just as easily recommend this as it's soo far away from my "normal" diet of gaming.
Go on...take a dive and see what's down there...