There is a new PR partnership between Halo 4 and PepsiCo and Spartan John-117 love it.
Potential Halo 4 players can get a head start on accruing extra experience by registering an account over at dewxp.com or doritosxp.com. Select codes from Mountain Dew and Doritos packages – starting on October 15 – can be used to increase your XP in Halo.
There are also goodies up for grabs, including consoles and controllers, Warthog toys and free Xbox Live subscriptions, among many other prizes.