Debug Mode
To enter Debug Mode, play these sounds from the level select screen: 1, 9, 9, 2, 1, 1, 2, 4. Press Start and hold A. To start debugging, press B, then you can select any sprite in that level and put it on the screen. To select a different sprite, press A, and to place it on the screen, press C. Note that sprite selection is different from Zone to Zone. Also, instead of displaying the time elapsed, it displays the number of sprites currently on the screen.

Level Select
From the main screen, select Options. Select Sound Select and play sounds 19, 65, 9, 17, then push C. Press Start to return to the main screen, and when Sonic and Tails appear, hold A and press Start.

To select any level in Sonic The Hedgehog, press UP, DOWN, LEFT, RIGHT, you will hear a chime, then hold SQUARE and hit START. Do this on the title screen after the Sega logo screen and ANY level in the game will be open to select!

• Blue Sphere game
  Play Sonic the Hedgehog and Sonic 3D Blast 20 times each, exit to the title screen and then go back into the game select screen and Blue Sphere will now be unlocked.
• Flicky
  Play Mean Bean Machine 30 times and Flicky will be unlocked.
• The Ooze
  Have a Sonic Heroes save on the Xbox.
• Comix Zone
  Have a Sonic Heroes save on the Xbox.

  Date Added: 1970-01-01

  Passwords For Blue Sphere

  it works: 0% | it doesn't work: 0%

  Level 1: 3659 8960 3263
  Level 11: 3454 5429 0879
  Level 21: 4092 0771 1670
  Level 31: 3897 4614 1116
  Level 41: 2817 0087 0076
  Level 51: 3298 8503 4428
  Level 61: 3227 7149 4844
  Level 71: 5073 2087 0844
  Level 81: 5388 6203 6924
  Level 91: 5183 2672 4541
  Level 101: 4446 4119 1869
  Level 111: 4251 7962 1309
  Level 121: 4545 7330 3741
  Level 131: 3610 2145 0173
  Level 141: 3582 0287 7885
  Level 151: 4053 1330 0413
  Level 161: 2994 1551 3010
  Level 171: 2788 8020 0626
  Level 181: 3426 3362 1426
  Level 191: 3188 7708 3570
  Level 201: 4857 0971 9474
  Level 211: 5338 9338 3826
  Secret Level: 2340 2318 5760
  
  NOTE: The secret level is never ending by default. Quit to end, or select another stage.

  Date Added: 1970-01-01

  Sonic 3 & Knuckles: Level Select and Debug Mode

  it works: 0% | it doesn't work: 0%

  Start a "no save" game. In Angel Island Act I, swing on a vine. Press LEFT, LEFT, LEFT, RIGHT, RIGHT, RIGHT, UP, UP, UP.