Don't go for this game expecting to be a good FPS.

The FPS mechanics are kinda awful. You have no clear feedback for getting hit and for hitting, the enemies don't react at all to bullets, the weapons don't have good animations for shooting, and do not have good SFX for shooting, even the shotgun feels like a peashooter, the grenades blow up way too fast and do not have good sounds nor graphics for explosion, the damage in headshots is strange (8 hits torso to kill, 6 hits head to kill.. why? )... The only good thing about the combat is the ammo disposition, you are always on the tip of your toes because the ammo is scarce.

But, i gave it 4 stars because the platforming bit is very nice, the puzzles are as well, the enviroment, atmosphere, and level design is very cool, and the plot and the ending plot twist leave you wondering on the real horrors of the stablished scenario.