Sonic The Hedgehog 4: Episode I HD (iPad)

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Alternate ending and Episode 2 preview

Collect all seven Chaos Emeralds in the Special Stages.

Alternate ending poses

Collect all the rings during the ending sequence and Sonic will show his fist pump pose from the Sonic The Hedgehog 2 and Sonic The Hedgehog 3 ending sequence, or turn into Super Sonic if you also have all the Chaos Emeralds.

Always get a jackpot

Enter a "slot machine" as Super Sonic.

Bonus levels and Chaos Emeralds

Complete a level with 50 rings. A giant ring will appear behind the end sign. Jump into the giant ring to advance to a bonus level. A Chaos Emerald will be at the end of all bonus levels.

Super Sonic

Collect all seven Chaos Emeralds. Then, enter any level, collect 50 rings, and you can now transform into Super Sonic.

Unlimited chances in Emerald Zone

Get 50 coins and finish an Act. Jump into the giant ring immediately after the Dr. Eggman sign. Try to get the emerald. If you are about to run out of time or hit the exclamation circle, pause game play and retry. You will restart only the Emerald Zone. You can do this as many times as desired.

Unlimited lives

Play the Casino Street Zone. Run through the level and activate the "slot machines" to again extra lives. When you are satisfied with the amount of lives collected, pause game play and leave the level to save those lives. Restart the level and repeat the process as many times as desired.

Various Game Center achievements

Complete the following tasks to unlock Apple Game Center achievements.

AchievementHow to unlock
All Stages Cleared (100 points)Defeat the final boss and view the ending.
Contender (50 points)Upload your recorded clear times for all Time Attack stages.
Crush Dr. Eggman (50 points)Defeat a boss for the first time.
Enemy Hunter (50 points)Defeat 1,000 enemies.
Golden Flash (100 points)Clear all Acts as Super Sonic.
Immortal (100 points)Build up 99 or more extra lives.
Ring Collector (100 points)Collect all the Rings in "Special Stage 1" and clear the stage.
Speed's My Game (100 points)Clear SPLASH HILL ZONE ACT 1 in less than a minute.
Super Sonic Genius (100 points)Acquire all seven Chaos Emeralds.
The First Chaos Emerald (100 points)Acquire a Chaos Emerald.
The Story Begins (50 points)Clear SPLASH HILL ZONE, ACT 1.
Untouchable (100 points)Clear the E.G.G. STATION ZONE without taking any damage.