Completion bonuses: Successfully complete the game under the normal difficulty
setting to unlock the hard difficulty setting, movie gallery,
voice test, background music, and continue mode options.
Successfully complete the game under the hard difficulty setting
to unlock artwork for the characters, enemies, and stages.
Successfully complete continue mode to unlock the Boulder Piercer
weapon for Benkei and the Gale weapon for Yoshitsune.
Hint: Hidden cover: Slip the cover sheet out of the game's case and look
at the back to find alternate cover art.