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Saw this while at a Sam's Club in Potomac Mills, Northern Virginia. This was behind another voucher for Brutal Legend, which was the normal $19.99 price. As far as I can tell it's 360 version only, but I don't know.
Annoyingly, about five minutes after I snapped that cell-phone pic, I discovered that they were actually out of the game in the back, even though they had left some vouchers out. Dammit!
I'll let you guys know tomorrow if I have any luck finding the deal (with copies!) at the Sam's in Charlottesville, VA.