Worlds are colliding in Sonic the Hedgehog's newest high-speed adventure!
Includes: Base game Explorer's Treasure Box, which contains useful items for your adventure: Amy's Memory Tokens, Knuckles' Memory Tokens, Tails' Memory Tokens, Portal Gears, Chaos Emerald Vault Keys, Additional Gloves & Shoes for Sonic Digital Art Book 25-track Digital Mini Soundtrack Experience Sonic like never before! In search of the missing Chaos emeralds, Sonic becomes stranded on an ancient island teeming with un..