If you still haven’t had a chance to buy Call of Duty 4 or Guitar Hero III for any platforms, you have until March 17, 2008 to get a $20 mail-in-rebate from Activision! Gamestop & Activision have teamed up to give you this amazing deal!

This offer is only available at you participating Gamestop & EB Games store. To download the Rebate Form, click here