Use the coupon BETATHANKS at GameFly for 20% off By w00py | October 27, 2012 0 Comment Use the coupon BETATHANKS at GameFly / GameFly UK for 20% off. Not sure when it ends. Stacks with their current THQ sale promo. So you could pick up Warhammer 40K: Space Marine for $5.99, Homefront for $3.99, or Red Faction Armageddon for $3.99. All activate on Steam.