Sonic Trilogy (Century Theoron)

Sonic 1

 * The Spin Dash has been added
 * Tails is unlocked after getting the 1st Chaos Emerald
 * Knuckles is unlocked after getting the 2nd Chaos Emerald
 * Sally Acorn is unlocked after getting the 3rd Chaos Emerald
 * Amy is unlocked after getting the 4th Chaos Emerald
 * Grounder is unlocked after getting the 5th Chaos Emerald
 * Scratch is unlocked after getting the 6th Chaos Emerald
 * a 7th Special Stage has been added
 * Super Sonic is unlocked after getting the 7th Chaos Emerald