Debug Mode:
     Head to the options screen and hold down L2 and press Circle.

Play as Kohryu:
     Play  through  arcade  mode without using any continues until you
face  Kohryu  on  stage  5.  Defeat  him  to  unlock him as a playable
character.

Play as Uranus:
     Play  through  arcade  mode  and  defeat  Xion  without using any
continues  up to that point. Defeat Uranus to unlock her as a playable
character.

No blocking mode:
     Obtain first place in arcade mode to unlock no blocking mode.

Expert mode:
     Successfully  complete arcade mode without continuing to unlock a
hard difficulty setting.

One-hit knockdown mode:
     Obtain  first  place  in  sudden  death  mode  to  unlock one-hit
knockdown mode.

High speed mode:
     Win 100 fights in survival mode with one character to unlock high
speed mode.

Low speed mode:
     Obtain a ranking in arcade mode with all characters to unlock low
speed mode.

One fall mode:
     Win  20  rounds in survival mode with one character to unlock one
fall  mode.  In this mode, the first character to fall will loose, but
they will be invincible to all other attacks.

Gallery pictures:
     Successfully  complete  the game with a character to unlock their
images in the picture gallery.

Sumo Game:
     To play the "Sumo Game" just get a hi-score in "Survival Mode."