FEAR is a quality FPS which really revives the single player element of the genre
Pros: The graphics in this game need to be mentioned, with the possible exception of Oblivion FEAR has the best DX9 graphics available. Cool "bullet-time" effect similar to Max Payne - when you get used to it you can run into a room with a squad of clone soldiers and kill them all with head shots from a pistol before they've even raised their guns!
The plot is good and its worth checking the many answer phone messages you'll come across to fill in background.
As the name might suggest the game is scary, there are frequent supernatural events that range from voices to vivid and disturbing hallucination style experiences. A.I. of the enemy soldiers is superb, unsurpassed infact, the soldiers will try to flush you out with grenades, they will vault over or slide under obstacles, take cover (even knocking over things to make cover) and all sorts of other stuff. The quality of the A.I. of the main grunt enemy may go some way to explaining why there are so many of them in the game - the developers obviously went to town to get it right.
The game just oozes quality and polish, everything is very well done and very detailed, from environments to the plot to graphics and A.I., this is an example of produced gaming at its best.
Cons:
Items and décor are over used some what, could of done with a bit more variety. I loose count of the number of identical spanners, toolboxes, telephones, computers etc.
There isn't much variety in foes, the intro sequence mentions a "battalion of super soldiers" and you pretty much get to kill every member of that battalion. There are a handful of foes other then the default grunt but they are rare.
The plots is a little disjointed in places and leaves you wondering what you missed.
Needs to be played on at least a mid-range PC with a reasonably good graphics Card. I would recommend no less than a 7800GS.
That may seem like a big list of cons but its just nit picking really, none of the items i've listed constitute a fault in the game, just small details that stop the game from being a prefect 10.