First run copies of include a special promotional code that nets you a free copy of first-person Red Faction: Guerrilla.

Unfortunately, the promotion is only running in the US where cards inside the first Darksiders printing grant a pro bono copy of the latest game for the platform for which you purchased Darksiders.

The game's official community website revealed the prise behind the codes, which had previously been a mystery.

There is one small catch: in order to receive your copy of Red Faction: Guerrilla, you must send in the promo code with the noted shipping and handling fee. Still, that's a pretty good deal.

By Tracy Erickson