$10 off $20 Purchase at Barnes and Noble when you use a Mastercard

You can combine this with their Buy 2 Get 1 Free promo.

 

Read Couponing to Disney's post for more details on how to maximize this promotion: http://www.couponingtodisney.com/2010/12/15/barnes-noble-save-10-off-any-20-purchase-with-a-mastercard/

 

So, possible deal scenario is to find 3 games that are just over $10 each that qualify for the Buy 2 get 1 promo. It would turn into Buy 1 get 2 free!