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