http://dealnews.com/Green-Man-Gaming-coupon-20-off-PC-games-Darksiders-for-4-more/625561.html
"Green Man Gaming cuts 20% off select game downloads for Windows via coupon code , as noted below. That puts each at the lowest price we could find by at least $4. The deals, after coupon:Metro 2033 for Windows for $3.99
Darksiders for Windows (pictured) for $4
The Darkness II for Windows for $6
Condemned: Criminal Origins for Windows for $6
Alan Wake: Collector's Edition for Windows for $13.98
Darksiders II for Windows for $19.99"