Sonic 3

Level select

Quickly press Up(2), Down(2), Up(4), after the Sega logo fades and Sonic starts to appear, and before the screen flashes white. A chime will confirm correct code entry. Press Up and highlight the sound test option on the title screen and press Start. Pause game play and press A to restart, B for slow motion, and C for frame advance.

Debug mode

Enable the "Level Select" code. Hold A, then press Start when selecting the desired level. Press B to change into an object in the level, C to copy that object, and A to change the object.

Bonus stage

Enable the "Level select" code. Enter the sound test screen and play song 01 and 0F.Highlight level 2, hold A and press Start.

Enable the "Debug mode" code. Go to the first level in the stage selection screen and keep playing until you get enough points to go to the gumball machine bonus level. After you start, press B to enable debug mode. Press A until you turn into a red spring. Press C to make springs all along the gap in the center. Next, press B again to turn back into Sonic and you will extra power-ups. When finished, use debug mode to transport you under the springs, where you will go back to the level. Note: It is a lot easier if the bouncers on the wall are most all used up.

Random start

Enable the "Level select" code. Select a level and begin game play. Pause game play and press A to return to the level selection menu. Choose another level to resume start in a different area. Note: Sonic may resume game play inside an object and crash the game.

All Chaos Emeralds

Enable the "Level select" code. Highlight the "Special Stage" level and press C + Start. Collect the emerald, press A + Start, and repeat the procedure to collect all the emeralds.

Alternately, enable the "Level Select" code and go to "Sound Test". In the level selection menu, play the following songs in order: 1, 2, 4, 5, 6. If done correctly, The Chaos Emerald sound will play. Highlight a level and press Start to begin game play. Obtain 50 rings, jump, and press Jump again while in the air to become Super Sonic.

Night game

Enable the "Level select" code. Highlight a level and press C + Start.