Biolab Core stage
Successfully complete Story mode to unlock the Biolab Core stage.
Nassau Station stage
Successfully complete Story mode with Helena to unlock a stage similar to the first stage of Halo 2, the Hangar Area.
Tatami Mat stage
Unlock all costumes and system voices and successfully complete Story mode with all seventeen characters to unlock the Tatami Mat stage, which has a floor mat with no walls.
Play as Ein
Successfully complete Story mode with Hitomi to unlock Ein in all modes except for Story mode.
Play as Gen Fu
Successfully complete Story mode with Eliot to unlock Gen Fu in all modes except for Story mode.
Play as Helena
Successfully complete Story mode with all sixteen characters to unlock Helena in all modes.
Play as Leon
Successfully complete Story mode with Zack to unlock Leon in all modes except for Story mode.
Play as Spartan-458
Successfully complete Story mode with Helena to unlock Spartan-458 from Halo in all modes except for Story mode.
Play as Tengu
Successfully complete Time Attack mode with all default and hidden characters to unlock Tengu.
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Fight Tengu in Time Attack mode
Defeat the first six characters with a time of 2:30 or less in Time Attack mode, and also score one “Greatest” (taking no damage against any one character in both rounds) as well to fight Tengu at the Ninja Hideout, but outside the tower in the pit. The “Jintsuriki” can be heard playing in the background.
Theater mode
Successfully complete Story mode with any character to unlock Theater mode and their movie. More movies can be unlocked by completing Story mode with different characters.
Commercial video
Successfully complete Story mode with all characters to unlock the U.S. television commercial for the game in Theater mode.
Increased bounciness
Enter “99” as your age in your profile to make the female characters’ breasts bounce more than usual.
Bonus system announcer voices
In the options menu, you can choose different voices for the system announcer. To unlock additional voices, enter Sparring mode and bring up the sparring menu. Select “Exercise” and you will be prompted to run through an extensive moves list. Successfully complete the moves list to unlock that character’s voice as a system announcer. Successfully complete Exercise mode with all default and bonus characters to unlock Alpha-152’s system voice.
Alternate character appearance
- Kasumi: At the character selection screen, press A to select Kasumi. Then, press Y to have Kasumi with a high pony tail. Press X to have Kasumi with a low pony tail. Press A to have Kasumi with normal (long) hair. Press Start to have Kasumi with her braided hairstyle.
- La Mariposa: First, complete Story mode with La Mariposa to unlock her alternate appearances. At the character selection screen, press A to select La Mariposa. Then, press Y or X to have La Mariposa without her mask on. Press A to have her mask on. To have La Mariposa appear as Lisa, successfully complete Story mode With La Mariposa two times. Select La Mariposa at the character selection screen and choose her fourth costume. This will reveal La Mariposa’s occupation, blood type, and birthday. Lisa is La Mariposa with a Kitty costume.
- Lei Fang: At the character selection screen, press A to select Lei Fang. Then, press Y to have Lei Fang wear eyeglasses (which can be knocked off during a fight). Press X to have Lei Fang in her old school braids. Press A to have Lei Fang normal (long) hair.
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