You can get your free Oreo Snack Packs at the nearest 7-Eleven store nationwide. Visit Oreo's promotional website shareoreo.com to register a free account refer at least 5 of your friends via email. That's it and get any of the 3 Oreo Snack Pack variants.
You can also play the games on the site and you can get up to three free Oreo Snack Packs!