Angry Birds is an application for the iOS, Windows Phone, Bada, Symbian, webOS, Android and Maemo mobile operating systems. It was released by Rovio Entertainment and made in Helsinki, Finland. The objective of the game is to eliminate the Bad Piggies and destroy their buildings and structures at the same time. This is done by the birds launching themselves out of a giant slingshot and hitting the pigs' various constructs, henceforth eliminating them. Each level allots the player a certain number of birds, which must be used in the order provided.