Just as in the original Angry Birds, players use a slingshot to launch an assortment of birds at nearby structures, with the intent of hitting targets located on or within them. The main targets are the pigs, and they can be defeated if directly fired at, or through other strategies, e.g.: the bird hits a structure that falls on the pig, defeating it. Small sized pigs are weak and easily defeated, while bigger pigs can sustain more damage. Each level pack represents a different "season", often based upon different themes and holidays. Different level packs have each unique theme and sometimes much different gameplay.
Season 2010 started in October 2010, when Rovio released a Halloween edition.Angry Birds Halloween, exclusive to iOS at the time and a separate game, included levels with Halloween-themed music and graphics. In December 2010, Rovio released Angry Birds Seasons to iOS, Android and Symbian 3 devices.Seasons introduced 25 Christmas-themed levels, one for each day leading to the holiday, similar to an Advent calendar. 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;Angry Birds Halloween users on iOS received the Seasons levels as a free upgrade. The Halloween version was given the episode title "Trick or Treat", while the Christmas episode was entitled "Season's Greedings".
Season 2011 began 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. In March 2011, Rovio released a new St. Patrick's Day update, entitled "Go Green, Get Lucky", followed by an Easter update, entitled "Easter Eggs", in April 2011 and a summer update, "Summer Pignic", in June 2011. In September 2011, "Mooncake Festival" was released in conjunction with the Chinese Mid-Autumn Festival. In October 2011, "Ham'O'Ween" was released and introduced a new orange bird, known as Bubbles. In December 2011, "Wreck the Halls" was released with 25 Christmas-theme levels also arranged in an Advent calendar setting.
Season 2012 started in in January 2012, when "Year of the Dragon" was released; it is about Chinese New Year. It features the replacement of the Mighty Eagle, the Mighty Dragon, that loops out the structures and defeats all the pigs; it is free to use. A Japanese Cherry Blossom season was announced on February 28, 2012 with a release date on March 7, 2012. In June 2012, Angry Birds Seasons added their twelfth season, Piglantis. It was launched on June 14, and is the second summer based episode (the first episode being Summer Pignic). The main new feature in Angry Birds Piglantis is fluid physics: the birds, wood, and glass are buoyant in the water levels; however, the pigs and stone are too heavy to rise to the surface and sink down until they are defeated. In August 2012, "Back to School" was added. It features a new pink bird, known as Stella. In October 2012 when Haunted Hogs was released and was a 3rd Halloween episode in the series. It added ghost blocks, which is visible to all items except the birds and the pigs unless they are inside them. On December 1, Winter Wonderham was released and was the 3rd Christmas episode in the series. Like the other Christmas episodes, it is setup as advent calendar. It introduced slippery blue ice, that makes wood, ice, stone, birds and pigs slip on contact.
Season 2013 began in May 2013, when Abra-Ca-Bacon based on World Circus Day was released; it has a magician theme and features magic portals, which can teleport materials, birds, or pigs from one portal to another. In December 2013 Arctic Eggspedition was released, the 4th Christmas episode, and it is once again set up as an advent calendar with one level unlocked per day or all unlocked with an in-app purchase.Season 3 or Season 2013 is currently the shortest episode in Seasons, with just two episodes.
Season 2014 began in July 2014 with South Hamerica and Pig Days, an episode that has weekly unlocked levels. With this update, the seasons were renamed showing the release year, such as "Season 2011". On October 9, 2014, the game has been updated with "Ham Dunk", in celebration of the NBA Championships. On October 27, 2014, the Visit FinlandTwitter account unveiled an image displaying Terrance swimming on a pool along a similar looking bird, colored blue, named "Tony the Blue", and the title "On Finn Ice", which is the 5th Christmas episode. The tweet also referred to the Finnish band Apocalyptica, who play the theme music for that episode. With this update, the episodes were arranged to the year they were released, not as it was previously; the "Winter Wonderham" episode, which was in Seasons 2013, was moved to Seasons 2012, as the episode was released in 2012.
The reception of Angry Birds Seasons has been positive. 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. Without the experience of playing the original, you can anticipate having to replay a lot of stages." He further mentioned, "Of course, these structural issues don't detract from what remains an entertaining game. Angry Birds Halloween is pleasantly more of the same, though you're best served by playing the original before tackling this holiday treat." Sarah Jacobsson of Macworld said about the Christmas update, "Unlike the original Angry Birds and Angry Birds Halloween, the Season’s Greetings track does not start out with a laughably easy level—after all, you only get one level a day, and Rovio wants to make you work for it." She further wrote, "Angry Birds Seasons brings fun, Christmas spirit to the most popular iOS game of the year. With the included Halloween track, you get a total of 69 challenging levels—definitely worth $0.99 (Angry Birds Seasons HD is $1.99)." Abigail Holden of Lazygamer rated the game 8.5/10, saying, "Whether you’re new to Angry Birds or you've enjoyed the game on other platforms, Angry Birds Seasons for PC is worth to look at.