Specially-marked packages of Mountain Dew and Doritos will contain codes to be used as currency in online auctions for Xbox One consoles beginning on November 5. Participants can begin to stockpile codes on the contest's website on September 30, but nothing's stopping anyone from stockpiling the snack foods for the next two months.
PAX Prime attendees can also scan QR codes hidden in the convention center to bid on Xbox One systems in an auction on Sunday from 9 p.m. til midnight PST. The QR codes can be scanned with the PAX Guidebook App to bid on one of 30 Xbox One consoles, as well as subscription cards, gaming headsets and general merchandise. The press release notes that some codes "are worth more than others," so scrounging for as many as you can find might be worth your time.