Square Bird is a free stacking game developed by Triangle Games for Android. It is a game where players have to build an egg tower and pass barriers while keeping the stack smooth and at the right level. The goal is to touch the grass three times with perfect landings to reach the Square Bird Fever mode.

In this game, players can stack fun square eggs to pass obstacles and angry monsters. The game speed increases as the player completes more levels. The game also features shooting mode, where players can activate it by stacking the perfect number of eggs to allow the bird to flap over obstacles with perfect accuracy. Players can also play bonus levels with different gameplay and unlock new secret levels. The game also allows players to customize their experience by choosing different skins, backgrounds, and bird houses.