Bad Piggies is a 2012 puzzle video game developed by Rovio Entertainment. It is a spinoff in the Angry Birds series and revolves around the green pigs rather than the birds. The player is tasked with building custom vehicles using various objects to guide a pig to the finish line, with levels having multiple solutions and optional additional goals achievable by applying alternate strategies. A sandbox mode, which allows the player to freely build any vehicle, is also featured.