Sega Mega Collection
Unlocking hidden games:
When you initiate Sonic The Hedgehog 1, 2, 3, Sonic And Knuckles,
Sonic 3D blast, Dr. Robotnic's Mean Bean Machine, or Sonic Spinball,
the screen states that it is logging the game data. That indicates
the game is logging in that you have initiated that game once.
After initiating a game fifty times, it no longer shows that
game-logging screen. It stops the logging sequence screen from ever
starting a game again and from then on, just starts the Genesis
program itself. To unlock a hidden game, you must start a particular
Mega Collection game fifty times, continually pressing Z to exit it,
then enter into the game repeatedly. Some hidden games do not
necessarily require that you start up fifty times, but you eventually
need to do so to unlock all the hidden games.
Flicky: Start Dr. Robotnic's Mean Bean Machine before reaching 50 times.
Blue Spheres: Start Sonic The Hedgehog and Sonic 3D Blast twenty times each.
Sonic 3 And Knuckles: Unlocked sometime in the process of starting
Sonic 1, Sonic 3, Sonic And Knuckles, and Sonic 3-D Blast fifty times.
Knuckles In Sonic 2: Unlocked in the process of starting Sonic Spinball
and Sonic 2 fifty times.
Ristar: Start the following games fifty times: Sonic The Hedgehog,
Sonic The Hedgehog 2, Sonic The Hedgehog 3, Sonic And Knuckles,
Sonic 2 And Knuckles, Sonic 3 And Knuckles, Sonic 3-D Blast,
Sonic Spinball; and start Blue Spheres 30 to 40 times.
Comix Zone (Japanese version): Select manual mode, then press Z(3),
Up(3), Down(3), L, R, Z. A sound will confirm correct code entry.
The Ooze (Japanese version): Select options mode, then press Up, L,
Down, R, Up, Z, Down, L, Up, R, Down, Z.