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.
Defeat 1,000 enemies.
Build up 99 or more extra lives.
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.
Acquire all seven Chaos Emeralds.
Clear SPLASH HILL ZONE ACT 1 in less than a minute.
Defeat a boss for the first time.
Acquire a Chaos Emerald.
Collect all the Rings in 'Special Stage 1' and Clear the stage.
Clear SPLASH HILL ZONE, ACT 1.