Users who've already purchased the Halloween version are reporting they're able to upgrade to Seasons for ... to the "Original Angry Birds" in the app store. The "Trick or Treat" levels are ...

After St. Patrick’s, Trick Or Treat and Season’s Greedings, Angry Birds Seasons is back – and now there are chocolate eggs and bunnies! Angry Birds Seasons features hours of gameplay ...

December 1 – Espoo, Finland – Today, Rovio has launched Angry Birds Seasons, a special edition spin-off of Angry Birds. Initially launched in the App Store as Angry Birds Halloween ...