Sonic the Hedgehog: Triple Trouble is a 1994 platform game developed by Aspect and published by Sega for the Game Gear. It is the sequel to Sonic Chaos (1993) and features classic side-scrolling Sonic gameplay. The player controls either Sonic the Hedgehog or Miles "Tails" Prower as they venture to protect the powerful Chaos Emeralds from Doctor Robotnik, Knuckles the Echidna, and series newcomer Nack the Weasel. Sonic and Tails' unique abilities, as well as various power-ups, can assist the player in gameplay.