Rovio has given Windows Phone users a fresh reason to fire up Angry Birds -- something to the tune of 100 vexing new levels. Also unique this time around, the game introduces support for Xbox Live achievements and leaderboards on Windows Phone 8. Rather than an update, however, this is a re-release of Angry Birds; you'll need to download the new version separately, which is free until May 15th. In other good news, if you own an entry-level Windows Phone such as the Lumia 610, you'll be glad to know that you can finally join in on the fun, since Angry Birds now supports devices with just 256MB of RAM. All in all, there's plenty to like about this one. Most of all, the price.