Blue Star II (Sonic's board) - Beat the Babel Story
Darkness (Shadow's jet sneakers) - Beat the Hero Story
Egg-Rider (Eggman's scooter) - Beat the Babel Story
Magic Carpet - Beat the Babel Story

Automated trails  -  To use automated trails to your advantage, wait for when the Analog-stick spinning part begins. When you spin it, it fills your air gauge. However if you keep spinning it beyond that, the speed meter will go faster up to a certain point.

Bonus characters  -  Successfully complete the Hero storyline to unlock Shadow The Hedgehog, Rouge The Bat, and Cream The Rabbit.

Successfully complete the Babylon storyline to unlock Eggman.

Bonus vehicles  -  Successfully complete the Hero storyline to unlock Shadow's Darkness jet shoes, Rouge's Temptation board, and Cream's Smile board.

Bonus modes  -  Successfully complete the Hero storyline to unlock Mission mode, Babylon storyline, and the ability to buy skates at the shop.

Automated trails  -  To use automated trails to your advantage, wait for when the Analog-stick spinning part begins. When you spin it, it fills your air gauge. However if you keep spinning it beyond that, the speed meter will go faster up to a certain point.

Defeating Babylonian God  -  To defeat this giant, play as Sonic. He has three lives. To catch him, get a good head start. He is very quick. Do not make a mistake or it will take awhile to catch up. When you start, you must catch up to him using the turbulence streams and the grind rails. It helps to make quick work of him. Also, use the ramps and try to make the most tricks you can, but do not take any unnecessary risks. After you start getting close to him, use your boost to go through the lamp-like object below him, and he will let out a cry. Then the stage will look like a digital place for a period of time. After it returns to normal, repeat the process. After the third strike you deliver, it will quickly turn into a race. If you are near the finish line, use the turbulence and your boosts at any costs. When you win you will see an intermission sequence showing what the legendary treasure really is.

Egg Factory: Avoid losing speed  -  Instead of losing speed when hitting the lava, boost through it to keep your velocity.

Faster boosts and stronger attacks  -  Depending on what level your attacks are, they will last for a longer time and have a paralyzing effect. At level 1, you will have a short boost and weak attacks; and no paralyzing. At level 2, you will have a medium sized boost and stronger impact on enemies; and short Paralysis. At level 3, you will have the longest sized boost and a powerful paralyzing attack on your enemies.

Faster boosts and stronger attacks  -  Depending on what level your attacks are, they will last for a longer time and have a paralyzing effect. At level 1, you will have a short boost and weak attacks; and no paralyzing. At level 2, you will have a medium sized boost and stronger impact on enemies; and short Paralysis. At level 3, you will have the longest sized boost and a powerful paralyzing attack on your enemies.

Successfully complete the Babylon storyline to unlock Sonic's Blue Star II board, Eggman's Egg-Rider scooter, and the Magic Carpet.

Splash Canyon: Shortcut  -  As Tails in level 2 of the Hero storyline, there is a shortcut in a waterfall. After you make the first jump, when you are turning around the bend there is a waterfall. If you go through the beginning of it, you will find a fly kicker and accelerators.

Trick sets  -  Every character has three sets of tricks that can be done. To see all three sets you must use the skates, boards, and motorcycles.

Turbulence  -  To use turbulence effectively, wait for it to appear and ride on it. After you see arrows on the side, move towards it to gain speed and air. Also, it is an effective way to get in position to pass and hit an opponent.

Voice announcer  -  When you play as Shadow, first perform a few tricks. If you listen closely, you can hear the announcer say "She has made a perfect landing!" or "She landed perfectly and has taken advantage of the speed boost."

Faster boosts and stronger attacks - Depending on what level your attacks are, they will last for a longer time and have a paralyzing effect. At level 1, you will have a short boost and weak attacks; and no paralyzing. At level 2, you will have a medium sized boost and stronger impact on enemies; and short Paralysis. At level 3, you will have the longest sized boost and a powerful paralyzing attack on your enemies.

Boosting with Knuckles - While playing as Knuckles (especially on missions), you can boost often to give yourself an edge or complete the mission on time. Keep in mind that when you punch through objects you will gain air; when you get hit by objects you will lose air.

Air riding - When "air riding" (riding through the hoops with flight characters), all you really need to do as you go off most ramps is to move fast enough. No jumping is necessary. Press X or B to boost just before you reach the ramp to just about guarantee you getting into the air. When air riding, just press the Analog-stick Up to move your character downward, and Analog-stick Down to move him or her upward (like a plane).

Wrong dialogue - Before the Dark Desert race, there is an intermission sequence showing Storm holding a chip-looking object. When everyone starts to read it, Storm will say "It's about the Babylon treasure from our ancient ancestors.", but it reads "It's about the Babylonian treasure from our ancient ancestors."

Shortcut in Babylon Garden - Go past the first ramp and first turn and you will see boosters. Ride into one and you will see a small ramp. Make sure your jump is at maximum without slowing down, and hold the Analog-stick Up. If done correctly, you will ride the turbulence that will shortly be created by a jet. Another shortcut is near the end of the track. When you see the end of the turbulence created by the jet, you will see a ramp. Go forward and make your jump maximum without slowing down, and hold the Analog-stick Up. If done correctly, you will cut half of the automated trail and reach the top faster.

New Gear in the Shop  -  To unlock new, exclusive gear in the shop, perform the following tasks:

"Super Hang-On" Gear  -  Complete all of Jet, Wave and Storm's Missions
"Hang-On" Gear  -  Complete all of Jet, Wave and Storm's Missions
"The Crazy" Gear  -  Complete all of Jet, Wave and Storm's Missions
"Opa Opa" Gear  -  Complete all of Jet, Wave and Storm's Missions

Audio Room BGM  -  To unlock game tracks in the Audio Room under the Extras menu, perform the following tasks:

"Catch Me If You Can"  -  Complete Babylon Story in Story Mode
"Theme of SEGA Carnival"  -  Unlock the SEGA Carnival Track in World Grand Prix
"Theme of Babylon Garden"  -  Complete Heroes Story in Story Mode
"Theme of Digital Dimension"  -  Complete Babylon Story in Story Mode

Hidden Tracks

SEGA Carnival - Beat Heroes Cup w/ Gold Emblem
SEGA Illusion - Beat Babylon Cup w/ Gold Emblem

Hidden Cameo Characters

AiAi - Beat all Jet, Wave and Storm missions
Nights - Beat all Jet, Wave and Storm missions
Ulala - Beat all Jet, Wave and Storm missions

Unlocking Boards/Scooters/Sneakers

Blue Star II (Sonic's Board) - Beat Babylon Story
Darkness (Shadow's Sneakers) - Beat Hero Story
Egg-Rider (Eggman's Scooter) - Beat Babylon Story
Magic Carpet - Beat Babylon Story
Skate type (Shadow's Sneakers) - Beat Hero Story
Bike type (Different Styles of Boards/Scooters) - Beat Babylon Story

New Characters  -  To unlock new playable characters, perform the following tasks:

E-10000G - Play for 20 hours straight.
Dr. Eggman - Complete Babylon Story
Rouge The Bat - Complete Hero Story
Shadow The Hedgehog - Complete Hero Story
Cream The Rabbit - Complete Hero Story
Super Sonic - Complete all Missions in Mission Mode with a Gold Emblem
E-10000R - Play the game for at least 50 hours

New Story Mode  -  To unlock the new Story Mode, perform the following task: Babylon Story Complete Hero Story

Unlock Super Powers  -  Beat everyone with super Sonic in "Free Race" to unlock everyone's full power. Shadow will be Super Shadow, Knuckles will be hyper Knuckles, and Tails will be Turbo Tails and (surprisingly) Eggman will be buff.