Complete Green Hill Zone
Complete Bridge Zone
Complete Jungle Zone
Complete Labyrinth Zone
Complete Scrap Brain Zone
Complete Sky Base Zone Act 1
Complete the Game
Find your first Chaos Emerald
Find all 6 Chaos Emeralds
Complete the Game with all 6 Chaos Emeralds
Complete the Game without dying.
Find all 18 1up monitors, one in each level.
Get 20 lives
Complete 1 Special Stage
Reach the 5th Special Stage
Complete 4 Special Stages
Complete all 8 Special Stages
Get 8 Continues
Get a 10 Ring bonus from a signpost.
Get a 1up bonus from a signpost.
Win a 500,000 point Special Bonus (18 1ups, 6 emeralds, 0 deaths, 8 sp. stages)
Complete the game with LESS than 20,000 points
Get a 30,000 point time bonus on any stage except Green Hill Act 1