Achievements

Achievements are obtained by the player after completed a certain task in the game. Achievements are available in the Apple's game service, Game Center, for those who uses iPhone, iPod, or iPad. And Google's game service Play Games, for those who uses Android devices.

The full list of Achievements can be found on this template below.

Trivia
Originally Rovio was using the Crystal Program for the Challenges, Achievements , Leaderboards and Social Networks but now they change it to the ones we know today.