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.
Unlimited lives:
Play the Casino Street Zone. Run through the level and activate the “slot machines” to gain extra lives. After collecting the desired amount of lives, pause game play and leave the level to save those lives. Restart the level and repeat as desired.
Bonus levels and Chaos Emeralds:
Complete a level with 50 rings and a giant ring will appear behind the ending sign. Jump through the giant ring to advance to a bonus level. A Chaos Emerald will be at the end of all bonus levels.
Super Sonic:
To unlock the ability to transform into Super Sonic, collect all seven Chaos Emeralds. Then, collect 50 rings in any level.
Always get jackpot:
Enter a “slot machine” as Super Sonic.
Trophies:
Bronze trophies
The Story Begins – Clear Splash Hill Zone, Act 1.
Crush Dr. Eggman – Defeat a boss for the first time.
The First Chaos Emerald – Acquire a Chaos Emerald.
Enemy Hunter – Defeat 1,000 enemies.
Golden Flash – Clear all Acts as Super Sonic.
All Stages Cleared! – Defeat the final boss and view the ending.
Contender – Upload your recorded scores and clear times for all stages.
Ring Collector – Collect all the Rings in ‘Special Stage 1’ and Clear the stage.
Silver trophies
Immortal – Build up 99 or more extra lives.
Super Sonic Genesis – Acquire all seven Chaos Emeralds.
Speed’s My Game – Clear Splash Hill Zone Act 1 in less than a minute.
Gold trophies
Untouchable – Clear the E.G.G. Station Zone without taking any damage.?