The last 20% Off coupon code for Green Man Gaming for their July Special has been released. The code should be good on most of the games on their site. If you do a search for Steam you will be able to find all the games that activate on Steam. There’s some good pre-order deals available.
The coupon code is FACEB-JULY4-20PEC
Please make sure to pay with or through Paypal if you’re in the US to avoid any foreign transaction fees by your credit card company.
EDIT: BTW the coupon expires August 1!