Why the hell don't you have this game yet?

This is a great game recommended to all of you who enjoy great storylines and perfect ambientation. It's not just a common FPS, it uses that point of view to encarnate the main caracter, Artyom, and give it an extra touch of realism; but this game could be a 3rd person game perfectly.
Even if this game is not F.E.A.R. nor Dead Space, it has some really scaring moments, it really knows how to play with sounds and lights.
It has some curious features that no other FPS has, for example the manually rechargeable battery, the using the bullets as money and the continuous time trial every time you go to the surface (because of the limited gas filters that you may find and carry).

Great graphics, not bad sounds (some gun sounds, as the revolver one, are poorly made), great storyline, great realism (sometimes even TOO MANY realistic, shoot at the belt of the pants of the enemy and it won't do any damage).