Older technology and designs became difficult to maintain, leading to the eventual delisting of the classic games in 2019.

Updates often ensured the mobile game looked like the most recent film or the newer entries in the franchise, such as Angry Birds 2 .

In version 6.0.6, Rovio updated many of the bird and pig sprites to match their appearances from The Angry Birds Movie . Why Were the Sprites Changed? The reasons for these changes varied by era:

Around version 1.6.0, Rovio began updating the game’s aesthetic. Many bird sprites, such as Matilda and Hal , were changed to their "Chrome" versions, giving them cleaner lines but often a more "angry" expression.

The modding community has created several "Sprites Changed" versions that mix and match assets from different eras.

In the initial launch, the birds used their "classic" designs. For example, Red had a grittier expression and the game featured unique Brazilian-themed backgrounds.

Angry Birds Rio : The Complete Guide to Sprite Changes and How to Download Them