Released on the Sega Genesis in 1994, Sonic the Hedgehog 3 was the trilogy in the classic Sonic series. Continuing the "Death Egg Saga", Sonic and Tails must stop Dr. Robotnik from relaunching the Death Egg.
Play through Angel Island Zone 1 until you find some vines. Start swinging from a vine and enter the following button combination: ←, ←, ←, →, →, →, ↑, ↑, ↑. Now press START and then press A to return to the title screen. Scroll down twice then choose the newly available sound test mode, where you can listen to the game's musical selections and choose your starting stage.
Level Select + Debug ModeEdit
Right after the Sega logo's screen darkens and Sonic starts jumping, quickly press ↑, ↑, ↓, ↓, ↑, ↑, ↑, ↑. This code is extremely hard to do, but if performed correctly, a ring sound should trigger. Scroll down twice on the title screen to the sound test mode. To enable debug mode, hold A and press start when choosing a level.