Trouble in Paradise
Complete Angel Island Zone
Speed Wash
Complete Hydrocity Zone
Garden Variety
Complete Marble Garden Zone
All Fun and Games
Complete Carnival Night Zone
Snowy Surfing
Complete Ice Cap Zone
Mobius, We Have a Problem!
Complete Launch Base Zone
Fungi Fields
Complete Mushroom Hill Zone
Electric Dreadnought
Complete Flying Battery Zone
Pyramid Problems
Complete Sandopolis Zone
Magma Massacre
Complete Lava Reef Zone
Angel Island Prophecy
Defeat Knuckles in Hidden Palace Zone as Sonic and/or Tails
Mechanized Memories
Complete Sky Sanctuary Zone as Sonic and/or Tails
Another Scrambled Egg
Complete Death Egg Zone
The Blue Blur
Beat the game as Sonic
Sonic's Flying Colors
Beat the game as Sonic with all 14 Emeralds collected
The Red Rumbler
Beat the game as Knuckles
Knuckles' Flying Colors
Beat the game as Knuckles with all 14 Emeralds collected
The Twin-Tailed Tyke
Beat the game as Tails
Tails' Flying Colors
Beat the game as Tails with all 14 Emeralds collected
Not-So-Slow Burn
Complete Angel Island Zone Act 1 in under 2 minutes
Aeronautics Funding
Complete Launch Base Zone Act 2 with at least 100 rings
Soap Shoes
Complete Mushroom Hill Zone Act 1 in under 3 minutes with a Bubble Shield
Hot-Tempered Temple
Complete Sandopolis Zone Act 2 with a Flame Shield
Tectonic Thunder
Complete Lava Reef Zone Act 2 as Sonic and/or Tails with an Electric Shield
Golden Flight
Reach 100 rings in The Doomsday Zone
Emerald Cost
Get a Perfect in a Special Stage
Ooh, Shiny!
Collect a Chaos Emerald
Bring Forth Chaos
Collect all 7 Chaos Emeralds
Hyper-Fixation
Collect all 7 Super Emeralds
Rings-a-Plenty
Collect 100 rings
Ring Ruler
Collect 200 rings
Dashing Decathlon
Earn exactly 10 lives
Live and Learn
Earn exactly 20 lives
Azure Lake Time Trial
Complete Azure Lake in under 0'30"00 in Competition Mode
Balloon Park Time Trial
Complete Balloon Park in under 0'50"00 in Competition Mode
Chrome Gadget Time Trial
Complete Chrome Gadget in under 0'45"00 in Competition Mode
Desert Palace Time Trial
Complete Desert Palace in under 0"40"00 in Competition Mode
Endless Mine Time Trial
Complete Endless Mine in under 1'00"00 in Competition Mode
Speedy Spelling Bee
Complete Grand Prix in under 4'00"00 in Competition Mode
Get a Life
Find the hidden 1-Up monitor in Angel Island Zone Act 2 on Sonic's path
Gambling Is a Skill
Hit the jackpot in the Slot Machine bonus stage
I'm Outta Here!
Go off the top of the screen in the Glowing Spheres bonus stage
High on 'Shrooms
Go off the top of the screen in Mushroom Hill Zone
Michael Jackson Style
Complete Special Stage 1 with a Perfect by going backwards without pausing
The Element of Choice
Change shields 5 times in the Gumball Machine bonus stage
Deathless Egg
From the start of Death Egg Zone Act 1, reach Giant Eggman Robo in Act 2 without dying, entering a bonus stage, or transforming into Super/Hyper form
Frozen Assets
Find the hidden area in Ice Cap Zone Act 2 containing 48 rings and a Giant Ring
In the So-nick of Time
Complete an Act with 9 minutes and 59 seconds on the timer
Left to Launch
Complete Launch Base Zone Act 1 or 2 without pressing Left
Put Through the Ringer
Complete an Act with at least 400 rings
Loan Shark
Find the trapezoid of 90 rings in Hydrocity Zone Act 1
Keeping Your Marbles
Complete Marble Garden Zone Act 1 without taking damage, entering a bonus stage, or transforming into Super/Hyper form
Pulling a Fast One?
Activate Level Select or Debug Mode - this will block ALL other achievements!