$10 Off Ninja Gaiden III ($29.99)

Retailer: Gamestop

Platforms: Xbox 360 / PlayStation 3

Link: http://bit.ly/RyQkZV  

If there's one thing ninjas are exceedingly good at, it's slashing things. Things like prices! Well, I guess there also pretty good at sneaking, but that's not going to help you save money, so we don't really care. You can pick up the latest in Ninja Theory's gory murderfest for a little cheaper at Gamestop this week.