Snake Rattle 'n' Roll is a platform video game developed by Rare. It was published by Nintendo and released for the Nintendo Entertainment System in North America in July 1990 and in Europe on March 27, 1991. The game features two snakes, Rattle and Roll, as they make their way through eleven 3D isometric levels. A Mega Drive version was released by Sega in June 1993 with an extra level. Snake Rattle 'n' Roll was developed by Rare members Tim Stamper and Mark Betteridge. The music was composed by David Wise and was inspired by "Shake, Rattle and Roll" and other 1950s-era songs. The object of the game is to navigate the obstacles in each level and eat enough "Nibbley Pibbleys" to ring a weigh-in bell located in the level, which will allow the snakes to exit. The game can be played by a single player or by two players simultaneously. Snake Rattle 'n' Roll has been named one of the top games released on the NES and one of the top games released by Rare. It is included in Rare's 2015 Rare Replay compilation for Xbox One. A follow-up for the Game Boy, titled Sneaky Snakes, was released by Tradewest in 1991. Gameplay Snake Rattle 'n' Roll features two snakes (Rattle and Roll) making their way through 11 isometric levels. The object in each level is to eat enough "Nibbley Pibbleys" – small round creatures found throughout each level – to gain enough weight to ring a bell on top of a weighing machine located at the end of the level; this causes a door for the next level to open. Players maneuver their snakes throughout the level with the control pad and are able to pick up Nibbley Pibbleys by lashing their tongue, which can also be used to attack enemies. The snakes' lengths increase when they eat; snakes grow more quickly when they eat Nibbley Pibbleys of their own color, and they grow the most when they eat yellow ones. Located in each level are dispensers which randomly spew out Nibbley Pibbleys; however, they also spew out bombs which can damage the snakes. When a snake reaches a long enough length, the tail begins to flash, which means the snake is heavy enough to exit that level. At that point, they must find and jump on the scale to ring the bell and open the exit door.