The terror of Lovecraft tales in a game that really make justice to the mythos.
You start as a police officer (if i dont remember wrong) that goes to help in the ride of a house full of lunatics that have been causing disturbs in the town, everything goes well, not too normal but well and in some point (no spoilers :D) everything changes and you have to start your life again and try to rememer who you are and what happened in several years you think lost, the story its grate as you reveal more pieces of the puzzle and travel deeper into the horror.
Even when this game is played in first person view, isnt a shooter, of course, you have plenty of firefights and the guns are the only way (most of the time) to survive close encounters with the horror. The great of this perspective is that allows you to experiment and feel closely all the sensations the main character has: pain, terror, vertigo, madness, vissions, etc.
The fear element its a great new element, when in other games you are an unstoppable destruction machine with no fear for any monster, devil, demon, or intergalactic alien menace you face, in de CoC you have to be careful exposing your character to potential traumatazing situations, because he scares, his vision blurs, start breathing faster, and even can end dead (you have a conveniently adapted heart beat diagram to follow the track of your condition) but in most the cases isnt necesary to use, because the game transmit you perfectly the feelings.
Theres a couple of thing that really bored me in this game. First, the sneakings parts arent too well crafted as you expect, its extremly hard to sneak in some parts and you have to do it obligatory because theres no other way (gun blazing exits) to solve the situation or escape. The second its the difficult, even in the easiest of difficults there are parts (specially at the end of the game) where its almost impossible and extremly hard to pass.
All in all its a great game that you should play with the lights off and let yourself enjoy the terror of the Dark Corners of the Earth.