ACHIEVEMENT - HOW TO UNLOCK Knuckles Finale (25 points) - Beat the game as Knuckles. Please Continue (25 points) - Earn a Continue in either a Bonus or Special Stage. Gettin' Super (25 points) - Collect all seven Chaos Emeralds. Chaos Emerald (15 points) - Collect a Chaos Emerald. Hot Feet (15 points) - Finish the Lava Reef Zone. Desert Runner (15 points) - Finish the Sandopolis Zone. Sonic Finale (25 points) - Beat the game as Sonic. Grease Monkey (15 points) - Finish the Flying Battery Zone. Fun Guy (10 points) - Finish the Mushroom Hill Zone. Extra Hedgehog (10 points) - Collect 100 rings. Two Sided (10 points) - Start the game once as each character. Extra! Extra! (10 points) - Enter a Bonus or Special Stage.