Extra Zone (Super Sonic and Super Blaze)
Collect all 7 Chaos Emeralds in Sonic's story and finish his story. You must also finish Blaze's story. The Extra Zone will be on the character selection screen once you meet both these requirements
Contributed By: pummy84.
Unlock Sound Mode and Time Attack
Unlockable How to Unlock Sound Mode Beat Game Time Attack Beat Game
Contributed By: Delition_Hikari.
Unlock Zone X in Time Attack
Zone X is an extra level not featured in the normal gameplay mode. There are 4 acts, and each are reminiscent of Sonic 2's loopy 2-player stages.
Unlockable How to Unlock Zone X Acts 1 - 4 Beat Game
Contributed By: StreetKlone.
Unlock Blaze as a playable character
Unlockable How to Unlock Blaze Defeat the first boss
Contributed By: sonickid.
Unlockable tracks in sound test
When you first unlock sound test, tracks 110 through 127 will be missing. To unlock these, you must beat the extra zone. To unlock the extra zone, you must complete both Sonic and Blaze's stories and collect all of the Chaos Emeralds as Sonic. If done correctly, A third icon will apear on the character select screen.
Unlockable How to Unlock Sound Test Tracks 110-127 Finish the Extra Zone
Contributed By: Taku128.
During any stage, try to find any rails nearby. When you find one, keep on doing the grind trick back and forth (The score for rails doesn't decrease like with other tricks) until you are sure you have the max trick score (Which is 20000). Now try to find any method of losing without touching ANY checkpoints nearby, when you lose and start the stage again on your previous checkpoint (Or the beginning of the stage), you will have the same time you had when you first reached the checkpoint. Now just beat the stage as fast as you can without worrying about trick points (Except for the Tension Gauge) and when you beat the stage, you will have a max trick score of 20000. This way, all you need to worry about when getting S-Ranks is your speed (Rings count more as a bonus).
Contributed By: xXSailorPlutoXx.
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