http://store.steampowered.com/ (http://store.steampowered.com/)
The Steam Holiday Sale has begun with multiple titles being offered with up to 80$ OFF.
If you ever thought about getting SWRC on Steam then at $4.99 now's as good a time as any.
If you fancy some manic FPS mayhem with Madballs then you can pick up Madballs in...Babo:Invasion, also for $4.99
And the daily specials get even better. If you haven't played S.T.A.L.K.E.R.: Shadow of Chernobyl yet then now's your chance. It's going for a stagerring $1.99
For something more up to date, L4D2 is going for $37.49 and Borderlands $33.49.
Lots of good opportunities to be had this week.