I just noticed Amazon are doing F.E.A.R 2 for the PC for the bargain price of £5.25 with free UK delivery.
I paid £10 in Sainsburys for this 2009 game just a few months ago. I've played the game right though twice now and it's very enjoyable. The graphics are good and there are no bugs that I noticed. It's not overly demanding in terms of PC resouces either. I've got a relatively old Nvidia 9600M graphics card on my lappy and it played the game in 1366 x 768 with everything turned up to the max.
If you liked the original F.E.A.R games, you will like this too.