Steam Big Picture release sale is on now and it will last a week.
A lot of games are discounted, ranging from 33-75% off.
Notable games:
Braid
Orc Must Die 2
Alan Wake franchise
Transformer: Fall of Cybertron
The Amazing Spiderman
Lego series
Magicka
Warhammer 40k: Space Marine
CS: GO
Limbo
Plus some other titles.
Enjoy.
Not so excited about the sale, but I am very excited by big picture mode and steam on linux. Can't wait for that beta to go open so I can put this on my TV.