Angry Birds Journey, previously known as Angry Birds Casual, is a slingshot puzzle game co-developed by Rovio Entertainment and Kuuasema and published by the former. It is the twenty-fourth game in the expanded mainline series, and the eleventh mobile game to use the slingshot gameplay style. Despite this, the game's mechanics base itself on the more recent tile-matching games, such as Angry Birds Match and Angry Birds Dream Blast. The birds act more like moves to the player, with the characters being provided in a random sequence. In addition to pigs, the birds' goal was originally to only free encaged hatchlings, who sometimes have missions tied to them (such as getting their containers to the bottom of the stage or to the top), but when rebranded to Journey, the main goal changed back to popping Pigs, however some levels still have the goals of freeing hatchlings. Also, the levels are not replayable, thus meaning that the stars are removed.