Debug Menu:
In the Main Menu highlight the Option. Press R2 and Circle.

Play as Kohryu: [Submitted by:Chappy]
Play through arcade mode until you face Kohryu on stage 5. Defeat him to unlock him as a playable character.

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

Extra mode: [Submitted by:Chappy]
Play through survival mode and defeat more than nine enemies to unlock extra mode in the options menu. Continue defeating more enemies in survival mode to unlock more survival games in extra mode.

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.

Hyper Beast Battle Mode
In arcade mode, fight 10 battles with the same character, then rank in with the same character in arcade mode to unlock Hyper Beast Battle mode.

No Guard Battle Mode
Finish arcade mode in first place to unlock No Guard Battle mode this only works in survival and vs.modes.

Sudden Death Survival Mode
Complete survival mode by winning nene figts to unlock the Sudden Death Survival mode.

Highest Difficulty
Successfully complete arcade mode without continuing one to unlock the highest difficulty level this only work in survival mode.

Sumo Wrestling Battle Mode
In arcade mode, fight 20 battles with the same character, then rank in at surivival mode with the same character to unlock Sumo Wrestling Battle Mode.

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

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

Expert mode
To unlock a hard difficulty setting, complete arcade mode without continuing.

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

High speed mode
To unlock high speed mode, win 100 fights in survival mode with one character.

Low speed mode
To unlock low speed mode, obtain a ranking in arcade mode with all characters.

Hidden modes
Defeat more than 10 opponents to unlock a bonus mode. Keep winning to unlock more modes.