Rovio Mobile has Angry Birds Seasons in the Amazon AppStore for Android for FREE (regularly 99-cents) for a limited time.

The holidays have arrived, but the Angry Birds still can’t catch a break from the tricks of those greedy green pigs. Whether it’s Halloween, Christmas, Valentine’s Day, or St. Patrick’s Day, the pigs’ hunger for poached eggs isn’t sated by festivities. Join the flock as they get angry all over again in Angry Birds Seasons.

Like in the original Angry Birds, the pigs hoodwink the peace-loving flock out of their precious eggs, leaving them with nothing but a powerful thirst for revenge. It’s time to bring back their unique brand of weaponry–the finger-powered slingshot–and unleash an arsenal of angry artillery in this package of four seasonal adventures for the world’s most popular physics-based casual game.

See climates whiz past as you soar through the air towards those greedy swine: destroy their new seasonally-themed bases with your feathery firepower, good aim, and plenty of holiday cheer.