Different worlds have their own gimmicks, for example, "Haunted Hogs" from the 2012 season featured ghost blocks which birds cannot make contact with and instead, phase through.

This update also added the "Quests" mechanic where each day the player would be given 3 tasks and, if they were completed, they would be rewarded birdcoins or a Power-Up.

[3] Angry Birds Halloween, exclusive to iOS at the time and a separate game, included levels with Halloween-themed music and graphics.

[3] On December 1, 2010, Rovio changed the name to Angry Birds Seasons to iOS, Android, and Symbian 3 devices.

[4][5] All versions include the previously exclusive Halloween levels and are offered as separate, stand-alone paid applications, with the exception of the free, ad-supported Android version;[6] Angry Birds Halloween users on iOS received the Seasons levels as a free upgrade.

Season 2011 started In February 2011, when Rovio released a Valentine's Day update to Angry Birds Seasons, entitled "Hogs and Kisses", complete with new themed levels and graphics, as well as the option to send Angry Birds-themed Valentine's Day messages through Facebook.

Interestingly, if the player was playing on an Android device and clicked level 5 of this episode, they would be greeted to a special blue Intel Golden Egg,[15] made to tie in with the then new web game, Angry Birds In: Ultrabook Adventure.

Season 2013 would begin far later into the year than usual, with the episode Abra-Ca-Bacon based on World Circus Day released in May 2013.

On October 27, 2014, the Visit Finland Twitter account unveiled an image displaying Terence swimming on a pool along a similar looking bird, colored blue.

This episode would feature the after mentioned Tony as a brand new playable character who had the ability of crashing down directly below him when the screen was tapped.

The fifth season began in February 2015, a second part of Ham Dunk was added as All-Star Weekend 2015, expanding the world to 60 levels (more than Trick or Treat, which has 45).

This update allowed the player to use Shockwave (electrical Bomb) for free, but only in Ham Dunk and for a limited time.

Finally, to wrap up 2015 to end with a Christmas episode, "Ski or Squeal" was added (in the usual advent calendar style), taking place a top a frigid mountain summit.

As spring rolled around about a month later, a new episode was released, called "Marie Hamtionette" where we celebrate Versailles Festival (after Marie Antoinette, queen of France in the 1700s), which is set in the garden of Ludpig XVI's (Louis XVI) estate, complete with hedges and topiaries across a wide landscape.

[21] Bundled together as Angry Birds Trilogy, the games were built specifically for their respective consoles, taking advantage of their unique features, such as support for PlayStation Move, Kinect, high-definition displays, and glasses-free 3D visuals.

Tracy Erickson of Pocket Gamer said about the Halloween update, "The difficulty is steeper than in the original Angry Birds, which is likely an intentional consideration for those well-versed in the first game.

This doesn't make Angry Birds Halloween unapproachable, but it does result in an undesirable increase in trial-and-error gameplay.

She further wrote, "Angry Birds Seasons brings fun, Christmas spirit to the most popular iOS game of the year.