Angry Birds: Seasons

Angry Birds: Seasons is a festival themed version of Angry Birds. The original release of the game was Halloween-themed but it has since been getting updates to coincide with other festivities and holidays. Each update includes a pack of levels that is themed after the corresponding festival. As of October 2014 the following level packs are included with the game: Trick or Treat* (Halloween themed; 45 levels)

• Season's Greedings (Christmas themed; 25 levels arranged as an advent calendar with a level unlocked every day)
• Hogs and Kisses (Valentine's day themed; 18 levels)
• Go Green, Get Lucky (St. Patrick's day themed; 18 levels)
• Easter Eggs (Easter themed; 18 levels)
• Summer Picnic (Summer themed; 30 levels)
• Mooncake Festival (Mid-autumn festival themed; 30 levels)
• Ham'O'Ween (Halloween themed; 30 levels plus a new bird, Orange Bird)
• Wreck the Halls (Christmas themed; 25 levels arranged as an advent calendar with a level unlocked every day)
• Year of the Dragon (New Year themed; 15 levels)
• Cherry Blossoms (Cherry Blossom festival themed; 15 levels)
• Piglantis (Summer themed; 30 levels)
• Back to School (School year themed; 20 levels, plus a new bird, Pink Bird)
• Haunted Hogs (Halloween themed; 30 levels)
• Winter Wonderham (Christmas themed; 25 levels arranged as an advent calendar with a level unlocked every day)
• Abra-Ca-Bacon (Circus themed; 30 levels)
• Arctic Eggspedition (Christmas themed; 25 levels arranged as an advent calendar with a level unlocked every day)
• South Hamerica (Aztec themed; 24 levels)
• Ham Dunk (Circus themed; 15 levels + 30 levels available only by IAP)

The gameplay remains the same as in the original Angry Birds. The titular birds have to retrieve their eggs from the thievish green pigs. The player uses a slingshot to launch the birds towards the buildings with the pigs inside. A level is completed when all the pigs have been crushed, either directly by the birds or by the collapsing structures. In Seasons, each level pack has special items that gives extra points when hit. For example, this include pumpkins for the Halloween levels, presents for the Christmas levels and eggs for the Easter levels.