GreenManGaming 20% off purchase coupons SUNNY-SAVER-20PEC or 20PEC-FACEB-SAVER
Can be used for pre-orders too.
For example I was able to combine it with a 15% off sale on the pre-order of Red Orchestra 2 non-deluxe edition to purchase it for $27.16 and it gave me a key I entered in Steam so I'm all set for when it releases a month from now. http://www.greenmangaming.com/search/?q=red+orchestra&x=11&y=15
email@example.com, Asus P8Z68-V Pro/Gen3, 16GB G.Skill@1600, Noctua D14, EVGA GTX 670 SC 4GB, X-Fi TitaniumHD, HAF932, Corsair TX850, Win7x64Pro, 3 x P2310H monitors, TrackIR4, Saitek X52Pro + Pro Rudders + Cessna Trim Wheel, Fanatec GT2 + G27 pedals + TH8RS shifter, Sennheiser HD580+ Modmic