Bad Piggies is a 2012 puzzle game developed by Rovio Entertainment, released as a spin-off to the Angry Birds series for iOS, Android, PC, Mac, Windows Phone, and BlackBerry OS. Rather than playing as the birds, players take control of the pigs, whose goal is to locate pieces of a map leading to the Angry Birds' eggs. Each level tasks the player with constructing a contraption capable of carrying a pig from a starting point to the finish. These vehicles and devices are assembled from materials including wood, iron, wheels, motors, and fans, as well as more unconventional components like soda bottles, balloons, umbrellas, and TNT. The contraptions must navigate both land and air environments, and the combination of available parts varies by level, requiring players to experiment with different configurations to find a successful design.