Have Darksiders? Don’t have a mystery code? No problem. You can still grab yourself a “free” copy of Red Faction Guerrilla from THQ.
U.S. Residence who purchased a new copy of Darksiders can send their receipt, their package barcode, and the money for shipping and handling to THQ via mail in form to get themselves a free copy of Red Faction: Guerrilla.
You can find the form of and other details here. The deal ends March 7th.