get a 35% off voucher that is good for 21 days when you pre-order
these select games:
Sim City: Limited Edition
Sniper Ghost Warrior 2
Company of Heroes 2
Dead Space 3
Aliens: Colonial Marines
Dead Island: Riptide
South Park: The Stick of Truth
Metro: Last Light
even better, GMG helpfully points out a way to chain them together:
If you buy any one of those games listed above, you'll receive a 35% off voucher. You could use that voucher on one of the games above*, and get another voucher. Rinse and repeat til you've cleaned up! How's that for a slice of fried gold?
A good kick-off point (for those outside of the UK, sorry mates, can't sell it there yet!) is BioShock Infinite, as vouchers aren't valid on this title, but you'll still receive one if you order it. If you order it now and choose cashback you'll receive your reward as fast as your bank can process (credit wouldn't go to your account until the game releases). Then use that cashback and your 35% voucher on another pre-purchase game so you get another 35% voucher!
I plan on kicking it off with Bioshock Infinite as suggested (grabbing the quick $10 back and using a $10 credit I have), then moving on to Sim City, Crysis 3, Dead Island Riptide and then grabbing Tomb Raider with the final voucher.