Age of Empires III has been under a 10 cent sale since Microsoft put the super-low price on the RTS game earlier today on the Games For Windows Marketplace web site. Now Microsoft has announced via the Games For Windows Facebook page that because of the high demand they have temporarily run out of CD keys that are necessary to authenticate the game.

Microsoft states, "You can still buy the game during the sale, and we will auto-assign your key in the next week. There is no action needed on your part, this will be done automatically." The Age Of Empires III 10 cent sale (which includes the original game and the expansion packs The WarChiefs and the Asian Dynasties) ends in about 90 minutes at 1 am Eastern time.