Unlimited lives
Hold [X] + [Circle] + [Square] + [Right]
at the title screen. Start the game. Hold [L1] + [R1]
when playing as Milo for unlimited lives. Milo will say "Great"
to confirm correct code entry.
FMV sequences
Get each of the eight Atlantean Symbols in a level
to unlock the corresponding FMV sequence under the Movie Viewer
option.
Concept Art and Character Models option
Collect each of the green gems in all levels to unlock
the Concept Art and Character Models options in the features menu.