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 all Acts as Super Sonic.
Clear the E.G.G. STATION ZONE without taking any damage.
Defeat the final boss and view the ending.
Clear SPLASH HILL ZONE ACT 1 in less than a minute.
Collect all the Rings in 'Special Stage 1' and Clear the stage.
Acquire all seven Chaos Emeralds.
Build up 99 or more extra lives.
Defeat 1,000 enemies.
Acquire a Chaos Emerald.
Defeat a boss for the first time.
Clear SPLASH HILL ZONE, ACT 1.