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Level select:
Quickly press Up(2), Down(2), Up(4),
after the Sega logo fades and Sonic starts to appear, and before
the screen flashes white. A chime will confirm correct code entry.
Highlight the sound test option on the title screen and press
Start. Pause game play and press A to restart, B
for slow motion, and C for frame advance.
Bonus stage:
Enable the "Level select" code. Enter the sound
test screen and play song 01 and 0F.Highlight level 2, hold A
and press Start.
Random start:
Enable the "Level select" code. Select a level and
begin game play. Pause game play and press A to return
to the level selection menu. Choose another level to resume start
in a different area. Note: Sonic may resume game play inside an
object and crash the game.
All chaos emeralds:
Enable the "Level select" code. Highlight the "Special
Stage" level and press C + Start. Collect the
emerald, press A + Start, and repeat the procedure
to collect all the emeralds.
Night game:
Enable the "Level select" code. Highlight a level
and press C + Start.
View animations:
Enable the "Level select" code, then press B
+ C.
Extra lives:
Set off the first alarm on the first level of the Launch Base
Zone. Wait in the middle of the alarm and perform Spin-Dash attacks
on the Flybots. The value of the Flybots will eventually increase
to 10,000 points as they continue to attack. Accumulate points
and lives at this location.
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