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! Worlds are colliding in Sonic the Hedgehog’s newest high-speed adventure! In search of the missing Chaos emeralds, Sonic becomes stranded on an ancient island teeming with unusual creatures. Battle hordes of powerful enemies as you explore a breathtaking world of action, adventure, and mystery. Accelerate to new heights and experience the thrill of high-velocity, open-zone platforming freedom as you race across the five massive Starfall Islands. Jump into adventure, wield the power of the Ancients, and fight to stop these new mysterious foes. Welcome to the evolution of Sonic games! Features Experience All-New Open Zone PlatformingRace across five massive overworld islands brimming with dense forests, overflowing waterfalls, and sizzling desert landscapes, each with their own unique action-platforming challenges and hidden secrets to uncover. Unparalleled High-Speed FreedomAdventure across the Starfall Islands and see what each has to offer at the speed only Sonic can deliver. Blaze a trail as you see fit and discover side quests, solve puzzles, scale enormous structures, go fishing, and encounter a friendly face or two along the way… Challenge Yourself In Cyber SpaceDiscover portals scattered across the island and venture into Cyber Space levels through portals scattered across the islands featuring signature 3D platforming at Sonic speeds, packed with challenges to put your skills to the test. Cyber-Powered CombatThe Starfall Islands are home to strange creatures Sonic has never encountered before. Use the all-new battle system and skill tree upgrades to fight strategically, combining moves such as dodges, parries, counters, combos, and the new Cyloop ability to take down mysterious foes and colossal titans. A New Adventure Full of Mystery and IntrigueBecome Sonic and journey to uncover the mysteries of the remains of an ancient civilization plagued by robotic hordes. With nothing but a handful of questions and a disembodied voice to guide you, set out to save your friends and the enigmatic inhabitants of the Starfall Islands from a colossal, mechanized threat. This game may be updated over time, and have paid for and free additional content released for it. Please be aware that this may increase the minimum requirements for running the game above the specification stated below.