Sonic the Hedgehog's Top 10 Cheat Codes

• UP, UP, DOWN, DOWN, UP, UP, UP

  Get 99 lives on World 2-2, because who needs to play the actual level?

  9. UP, UP, UP, DOWN, DOWN, DOWN, DOWN
• UP, DOWN, UP, UP, B, A

  Unlock the secret level in the Green Hill Zone, but only if you want to get a stomachache from eating too many loops.

  10. LEFT, RIGHT, LEFT, RIGHT, LEFT, RIGHT, LEFT

Don't even get me started on the actual codes for the Chaos Emeralds...