Sonic Adventure

Faster Sonic spins:

Continuously tap X or B to spin faster.

Play as Super Sonic:

Complete the game using all six starting characters to unlock Super Sonic. Sonic will transform into Super Sonic after some time into the next game.

Jump over the train in Station Square as Sonic or Tails. You will find him on the other side.

Glass Sonic:

Get the shoe and the ring power-ups, then find a location where you can see Sonic up close, without using the D-pad. Hold B or X to start spinning, and Sonic should look like glass.

Bonus NiGHTS area:

Drop in the top hole while playing in the pinball section of the casino level to reach another pinball machine. Place the ball into the middle hole to fly through a warp and reach an area based on NiGHTS.

Play as Tails:

Controller two may be used for Tails after he is obtained during game play in story mode. Note: Shields, invincibility and extra life boxes have no effect on Tails if collected. Note: If Tails goes too far away from Sonic, he will appear next to Sonic.

Play as E-102 Gamma:

Although E-102 Gamma explodes at the end of his adventure, it is possible to get him back. Complete his adventure, then reset the game and go back to his adventure after it is saved. You can play as E-102 all you want . However, it is always night except for on the Egg Carrier and in certain levels.

Full pause screen:

Pause game play, then press Y + X.

Hidden Puzzle VMU Game:

Connect a controller with a VMU in its first slot to port D before turning on your Dreamcast with Sonic Adventure in the drive. You will be able to play a hidden VMU game called Chao Puzzle on that controller when you start a game.

Alternate Twinkle Park Race views:

Press Up during the Twinkle Park Race level to change views.

Alternate snowboards:

Press X immediately before entering the snowboarding portion of the game to get a blue snowboard or B for a yellow snowboard.

Hidden artwork:

Put the game disc in a PC compatible CD-ROM drive to find additional images from the game in the "extras" directory.

Sonic Shuffle

Hidden artwork:

Place the game disc in a PC compatible CD-ROM drive to find artwork from the game in the "sonic shuffle" folder.

Bonus characters:

Successfully complete story mode to unlock more playable characters.

E-102 Gamma:

Purchase the last picture of Amy in Sonic's room to unlock E-102 Gamma in versus mode.

Chao:

Purchase all pictures of Knuckles in Sonic's room to unlock Chao in versus mode.

Super Sonic:

Purchase all pictures of Sonic in Sonic's room to unlock Super Sonic in versus mode.

Big:

Purchase all pictures of Tails in Sonic's room to unlock Big in versus mode.

NiGHTS:

Set the Dreamcast system date to December 24 to replace Lumina with NiGHTS. Note: All characters may need to be unlocked first.

Notebook computer:

Successfully complete the game and enter Sonic's room to find the notebook computer on the table.

Hint: Get two Force Jewels:

When you are in battle, their will be a HP card with a number over the enemy's head. If you get the same number card as the enemy, it will say "Critical". After the battle is over, it will show you two Force Jewels. Note: This does not work with Preioustones Battles.

Sonic Adventure 2

Hidden artwork:

Put the game disc in a PC compatible CD-ROM drive to find additional images from the game.

Full pause screen:

Pause game play then press X + Y.