Play as Blaze:
To unlock Blaze, defeat the first Boss.
Sound test:
Beat the game to unlock all sound tracks except for tracks 110-127. Beat the Extra Zone to unlock tracks 110-127.
Time Attack mode:
Beat the game to unlock Time Attack mode. Beat the Extra Zone to unlock four additional Time Attack mode levels.
Extra Zone:
Beat Sonic’s and Blaze’s story line with all seven Chaos Emeralds to unlock Extra Zone at the character selection screen, where you play as Super Sonic and Super Blaze.
Remain in air longer with Blaze:
To remain in flight longer while playing as Blaze the cat, instead of holding R, rapidly tap R.
Easy lives:
To easily gain lives, play either Leaf Storm Act 2 or Mirage Road Act 2 repeatedly to get one or two extra lives each time you play.
Sonic runs backwards:
To make Sonic run backwards in Dead Line Act 1, run into the first spring, then release the D-pad.
Stick to a wall:
To make Sonic or Blaze stick to a curved wall at the side of a loop, jump into it and press and hold the D-pad in the direction you are hitting the wall.
Dead Line Act 2 Rings:
Dead Line Act 2 has the most rings in the game. You can get around 300 rings if you can find the Ring Magnet power-up.