Free upgrade code to Digital Deluxe edition of Civ 5 (must have civ 5 base)
Decent game and I have no idea what this adds.
I found this code, says expires 3/31/11 or while supplies last. So don't want to sell it since it might not work, but I think it will (for first person to use)
Figured someone could use it so If you can go for it!
Although not required , If you want I'll gladly take a small donation! =p