Loads of PC games are on sale @ Amazon.
I was looking for a copy of Metro and found it for £15.99 with a free copy of Red Faction bundled with it.
Then at the bottom of the page I noticed others are reduced too:
Bioshock 2 (PC DVD) £12.99
Just Cause 2 (PC DVD) £22.10
Grand Theft Auto: Episodes from Liberty City (PC DVD) £14.99
Tom Clancy's Splinter Cell Conviction (PC) £14.57
Dragon Age Origins: Awakening (PC DVD) £11.99
Aliens Vs Predator (PC DVD) £12.98
Assassin's Creed II (PC) £17.98
Crysis 2 (PC) (PRE-ORDER) £26.91
Max Payne 3 (PC DVD) (PRE-ORDER) £24.99