Full list of all 16 Sonic the Hedgehog 4: Episode I achievements worth 200 gamerscore.
Clear Splash Hill Zone Act 1.
Acquire a Chaos Emerald.
Defeat 1,000 enemies.
Clear all Acts as Super Sonic.
Defeat the final boss and view the ending.
Upload your recorded clear times for all Time Attack stages.
Collect all the Rings in 'Special Stage 1' and Clear the stage.
Build up 99 or more extra lives.
Acquire all seven Chaos Emeralds.
Clear Splash Hill Zone Act 1 in less than a minute.
Clear the E.G.G. Station Zone without taking any damage.
Get 120 rings in Mad Gear Zone Act 1.
Finish all 3 Acts and boss round of Splash Hill Zone
Finish all 3 Acts and boss round of Casino Street Zone
Finish all 3 Acts and boss round of Lost Labrinth Zone
Finish all 3 Acts and boss round of Mad Gear Zone