This only works if you have an Amex credit card associated with you xbox live account. If you do, microsoft will pay you 25 bucks to beat the single player campaign of the imminent Halo 4 on Normal or Hard. Beat it on Legendary for a chance to win a ticket to E3 2013.
Aside from this being a pretty cool offer, I think it's really funny that a publisher is actually offering people money to play the most overlooked portion of their game.
"Yeah, we're sorry you just spent $60 on our game. We'll give you 25 back if you actually play it" :lol: