If you are a DIRECTV subscriber check channel 112. You should see a Dr. Pepper Manliest Games Ever mission. Once you do click (using your remote of course), the Initiate Yourself button and fill out the form. Once you submit it you should see a notice that you will receive a free Dr. Pepper Ten product.
The voice is annoying and the game is too. I decided I didn't care about the freebie enough to go through the process.