Angry Birds long enough to do so? Thanks to a recently published expansion to Rovio's tower-toppling App, you can now kill two birds with one high-velocity bird. For $0.99 on iOS ($1.99 for the HD version), or for free (but ad-supported) on Android, you can download "Season's Greedings," an add-on that features a new level every day in the 25 days leading up to Christmas. It's like an advent calendar! Only ... like, way more fun.
Purchasing the pack also unlocks the 45-level Halloween expansion for free -- or, if you've already acquired this extra spooky level pack, you can grab "Season's Greedings" in a free title update. We wonder if we can expect a purchase of this new add-on to grant us free admission to the next holiday-themed level pack, "New Year's Evil Pigs," or "Punxsutawney Panic." (Yes, those are made up. For now.)
Download: Angry Birds Seasons [iOS SD: $0.99] [iOS HD: $1.99] [Android: Free]