Sonic-Zilla: Enter the options menu and select the "SFX"
option. Play sounds 0, 2, 1, 1, 6,
6 (in order). The screen will shake to confirm correct
code entry.
Free movement: Enter the options menu and select the "SFX"
option. Play sounds 0, 9, 0, 1, 6,
8 (in order). The screen will shake to confirm correct
code entry. Pause game play and hold A to move Sonic around
the screen.
Level skip: Enter the options menu and select the "SFX"
option. Play sounds 0, 2, 1, 5, 6,
6 (in order). The screen will shake to confirm correct
code entry. Pause game play and press Down to advance
to the next level.
Start with 9 lives: Enter the options menu and select the "SFX"
option. Play sounds 0, 3, 1, 1, 5,
5 (in order). The screen will shake to confirm correct
code entry.
Reversed gravity: Enter the options menu and select the "SFX"
option. Play sounds 0, 8, 0, 7, 7,
1 (in order). The screen will shake to confirm correct
code entry. Press 1 + 2 + Start during game
play to enable the code.
No gravity: Enter the options menu and select the "SFX"
option. Play sounds 0, 9, 0, 1, 6,
8 (in order). The screen will shake to confirm correct
code entry. Press 1 + 2 + Start during game
play to enable the code.
Very low gravity: Enter the options menu and select the "SFX"
option. Play sounds 0, 8, 2, 7, 6,
6 (in order). The screen will shake to confirm correct
code entry. Press 1 + 2 + Start during game
play to enable the code.
Low gravity: Enter the options menu and select the "SFX"
option. Play sounds 0, 4, 1, 9, 6,
4 (in order). The screen will shake to confirm correct
code entry. Press 1 + 2 + Start during game
play to enable the code.
Medium gravity: Enter the options menu and select the "SFX"
option. Play sounds 1, 0, 1, 3, 6,
7 (in order). The screen will shake to confirm correct
code entry. Press 1 + 2 + Start during game
play to enable the code.
High gravity: Enter the options menu and select the "SFX"
option. Play sounds 0, 3, 1, 9, 6,
8 (in order). The screen will shake to confirm correct
code entry.
Reversed colors: Enter the options menu and select the "SFX"
option. Play sounds 0, 2, 2, 7, 6,
9 (in order). The screen will shake to confirm correct
code entry.
Reversed colors and fast music: Enter the options menu and select the "SFX"
option. Play sounds 0, 9, 1, 2, 5,
4 (in order). The screen will shake to confirm correct
code entry.
Fast music: Enter the options menu and select the "SFX"
option. Play sounds 0, 4, 2, 5, 5,
7 (in order). The screen will shake to confirm correct
code entry. Press 1 + 2 + Start during game
play to enable the code.
Slow motion: Enter the options menu and select the "SFX"
option. Play sounds 0, 4, 2, 9, 6,
4 (in order). The screen will shake to confirm correct
code entry.
Very slow motion: Enter the options menu and select the "SFX"
option. Play sounds 0, 5, 1, 3, 7,
0 (in order). The screen will shake to confirm correct
code entry.
