All levels and bonuses:
Pause game play, then quickly press R, Black, Y, Black, L, White. The sound of
an explosion will confirm correct code entry. This will unlock all levels and
bonus items such as Single Mission, Free Roam, Costume Select and more.
Unlimited health:
Pause game play, then quickly press Black, White, L, X, L, White. The sound
of an explosion will confirm correct code entry.
X-Ray graphics:
Pause game play, then quickly press L(2), R, L, Y, X, White, Black(2), White.
The sound of an explosion will confirm correct code entry.
Freeze graphics:
Pause game play, then quickly press R, L, Black, White, L, Y(2), Black, R,
White. The sound of an explosion will confirm correct code entry.
Bonus costumes:
The following costumes will become unlocked at various points throughout the
game, after a particular mission.
Original
Golden Age
Silver Age Superman Red
Silver Age Superman Blue
The Return of Superman Black
Superman of the 90s
Kryptonian
Post-Our Worlds at War Mourning
Kingdom Come
Free roam option:
Successfully complete mission 4 to unlock the free roam option. This allows
you to replay any mission that has been completed in single mission mode.
Sites: