Angry Birds Seasons has received an update making the game free to play and the update adds a new episode too.
Changelog:
SOUTH HAMERICA EPISODE! 24 free levels plus three bonus ones, each packed with relics, artifacts and… pesky piggies!
NEW PIG DAYS! Pig Days levels celebrate various special events, anniversaries and holidays from around the world – there’s a fun, new challenge almost every week!