In October 2010, Rovio released a special Halloween edition of the game. Angry Birds Halloween, exclusive to Apple iOS at the time and a separate application from the main game, included new 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 titled "Season's Greedings". In February 2011, Rovio released a new Valentine's Day update to Angry Birds Seasons, titled "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, titled "Go Green, Get Lucky". Rovio has announced a new Easter update, which will be released at some point before the actual holiday
Atas permintaan ramai, Angry Birds 2011 Seasons [PC].
Dalam format .ISO (dont know why the original uploader make in ISO. theres 2 game inside. old one and season one)
Bukak dengan PowerISO, then unrar using winrar. run play. no need install. its portable.
Some ppl report ada virus dalam file game ni. Aku dah test sendiri takde plak detect.
So some antivirus are subjective. download/run at own risk.
credits to nasir96