Microsoft released a game called Wordament for iPhone.
The game has been very successful on Windows Phone and it is now available for iOS.
A special feature of Wordament is the fact that it is the first Xbox Live game with cross-platform multiplayer.
Originally it was a side-project for two employees of Windows Live that was acquired by Microsoft Game Studios.
That means iPhone users can play against Windows Phone and Windows 8 players.
It is also the first game from Microsoft for iOS that has the ability to unlock Xbox Achievements.
Wordament is a game of words in which you can compete in real time with anyone else who is playing at the time.
On a 4 × 4 grid you must create words by swiping your finger between adjacent letters. Everyone plays on the same grid at the same time.
Wordament is available for free on the App Store.