One of the coolest features on the Windows Phone, was the ability to unlock achievements from select games. However, this feature might be heading to iOS in the near future. While you might write this off as a silly rumor, there is already a game that supports this feature.
Having released a few days ago, Wordament offers iOS users the ability to cross play with Windows 8 users and the ability to unlock Xbox Achievements. Sure it’s not the best game around, but it might be a sign of things to come!