Please note that this is a single person's opinion on this game, and only facts and opinion will be stated.
Everything that could have been wrong went wrong with this game.
The stealth mechanics are pure garbage, you can't hide once found and everything about the stealth mechanics fells so simple and limited compared to other stealth based games like the Metal Gear Solid/Splinter Cell series, and you will be forced into a fire fight no matter what.
shooting also fells very limited as you get and find new weapons all the time but many of these weapons are too "op" and most can kill in 2-3 shots even on lower body parts.
You would guess an agent sent alone into a hostile environment would be well armed wrong guess, you get to chose 1 weapon at the beginning mission, and a very limited amount of ammo, you will have to search and kill for a reasonable amount of ammo, weapons, grenades, and more, this cripples the action as you are constantly changing weapons and reminded that one shot wasted is a bullet less.
At first i believed this game was released back in 2007-8 but boy was i wrong, this graphical disaster was first released in 2011, with all its clunky movement, over-simplified characters and graphics where black,gray and gold is the "thing"
The story is (without spoiling) about an agent working for a company that constantly sends him out where guns and fire-power is needed while he is trying to find out who attacked the lab he worked in the first time.
Might as well watch a crime-thriller cause that's what this game is.
I really tried to like this game, and i really tried to find something positive to say about it but the only good thing that came out of this "thing" is that the game and dlc are now integrated with the Director's Cut edition.