| Console: | Sega Mega Drive |
| TV Standard: | Region Not Set |
| Developer(s): | Sega |
| Publisher(s): | Sega |
| Release Date: | 1994-10-18 |
| Players: | 1 |
| Co-op: | No |
| ESRB: | E - Everyone |
| Type: | Platform |
'Sonic & Knuckles' is locked-on to the original Sonic the Hedgehog or Sonic Compilation via Lock-On Technology, the result is a deceptive "No Way!" screen. However, by pressing the A, B and C buttons together players can access Special Stage levels, commonly known as the "Blue Sphere" levels. Levels can be accessed by inputting a twelve digit code, every number combination a different variation of a Special Stage level.
