Just when you thought the Angry Birds craze was over after the vast number of downloads related to the Android version, Rovio has announced the Angry Birds Halloween Special Edition. This special edition packs a juicy 45 levels, spooky new music and graphics, not to mention the all-important pumpkins. The game will set you back $0.99 on the iPhone, while the HD version for the iPad will cost $1.99. Both versions will be available in the App Store from October 21st, though the bad news for Android users is that this version is exclusive to iOS.