Full list of all 12 Sonic the Hedgehog 4 - Episode I achievements. It takes around 12-15 hours to unlock all of the achievements on Windows.
Upload your recorded scores and clear times for all stages.
Clear the E.G.G. STATION ZONE without taking any damage.
Clear all Acts as Super Sonic.
Collect all the Rings in 'Special Stage 1' and Clear the stage.
Build up 99 or more extra lives.
Clear SPLASH HILL ZONE ACT 1 in less than a minute.
Defeat the final boss and view the ending.
Acquire all seven Chaos Emeralds.
Defeat a boss for the first time.
Acquire a Chaos Emerald.
Clear SPLASH HILL ZONE, ACT 1.
Defeat 1,000 enemies.