It does, at least in my eyes. There need to be more games out there that have the originality of this enviorment and story. Also it's the first game since the Oddworld games that I know has a good ending or bad ending depending on what you do in the game, which is a first as far as my memory goes for a shooter genre.
You're not going to be bored with this game for a second because with every step you take you're on your toes waiting for some lunatic to jump out of the shadows.
The only nitpick I have about what I've played in the demo is the first few minutes... The guy crashes into the sea, is the sole survivor without a scratch no less, manages to swim to a nearby lighthouse and decides to step into the submarine thingy? Minus points for making sense of the story there because no person with more then 1 braincell is going to even step inside that scary lighthouse after he's just crashed and survived. I would sit at the lighthouse and wait for the coastguard
.