Though the deal lasts as long as supplies last, it looks like supplies can be updated and restocked daily. Keep an eye out the next day if it runs out of stock and you still want to snag the game!
Also, I picked up a few other bad ass games for $6.88 on Walmart.com, like Wolfenstein the New Order, Dead Rising 3, Thief, and Metro Redux. Call of Duty Ghost was only $4.88, Minecraft was only $8.32, and I wish I'd held off on Shadow of Mordor because it's only $9.00. I picked all of these up because, at that price, why not?
Some of these are out of stock now, but this changes daily. Check out the full list of these games at from time to time if you want a ridiculous deal: