Kasumi: Alternate hair:
Highlight Kasumi at the character selection screen. Press A to have her hair in a pony tail or X for a long hairstyle.

Kasumi: Schoolgirl costume:
Successfully complete exercise mode in the sparring mode.
Information in this section was contributed by Y2KeViN52.

Ending credits:
Successfully complete the game with all fighters. An option to toggle the ending credits will be unlocked on the game settings screen.

Unlock Ein
Complete "Story Mode" with all characters. Then play "Survival Mode" or "Time Attack Mode" and get ranked in and enter your nickname as "EIN". After that, Ein will be playable in all modes except "Story Mode".

Unlock Kasumi's 3rd Costume
Complete "Exercise Mode" in "Sparring Mode".

Unlock Zack's 3rd Costume
Defeat 20 opponents in "Survival Mode".

Unlock Ein's 3rd Costume
Complete "Time Attack Mode" under 6 minutes.

Unlock Theater Mode
Complete "Story Mode" with a character to unlock "Theater Mode" and that ending movie with that character you play is playable.

Unlock Staff Roll
Complete "Story Mode" with all characters. The last character you complete the game with will show the ending movie and then shows the staff roll credits.

Kasumi's Hairstyle
When selecting Kasumi, press Y for her long hair or A for her ponytail.

Slow Mo Replay
Once you win a match hold X+A+B until the replay starts. You should then be able to rewind/slow mo the action with the Y button.

Change Colors
If you select your character and costume with the ''X'' button most will have an alternate color. Lei Feng has 3 different dress colors based on which button you press (X,Y, or A).

Rotate Camera Angle
After winning a match and your character does their victory pose, you can press the left stick in, then move it around to angle the camera differently. If you press the right stick then move it around, it zooms in and out.

Play as Ein:
1. First Beat the game with every character.
2. Take Hayate through Survival or Time Attack Mode, and place.
3. Enter your name as "Ein".
4. You can now play him in any mode but Story.

Unlock Kasumi's third costume:
In the Sparring Option, Perform all of Kasumi's moves under the "Exercise" Option. Once the game awards you the "Complete!" award, you'll have the costume.

Unlock Zack's third costume:
Beat 20 people in Survival Mode

Kasumi Hair Trick:
When picking Kasumi, press Y for her long hair, A for her pony tail. .

Beat the game with each character to see each ending:
Unlock 'Real Ending' with On/Off Option. Beat the game with everyone. The last character you beat it with will have the staff credits attached to the ending. Once that's done, you can decide if you want the credits on or off the endings in the Game Settings Screen

Watch clips:
When you play as story mode after you have beaten OMEGA you can watch a small clip. At the main menu you can watch the clips of all the characters that have beaten story mode.

Alternate costumes:
Several characters have alternate versions of the default costumes depending on what button you use to select them on the character screen:

Kasumi: (works with cos1-3) Select with A - ponytail, Select with X - braided ponytail, Select with Y - hair down

Hitomi: Select with X on cos1 - same as cos1, but w/out jacket

Tina: Select with X on cos1 - green shirt, leopard pants

Leon: Select with X on cos1 - no shirt w/ bandolier

Jann Lee: Select with X on cos1 - black pants, Select with X on cos2 - yellow
version

Christie: Select with X on cos2 - purple version

Hayate: Select with X on cos2 - green version

Hayabusa: Select with X on cos2 - white version

Brad Wong: Select with X on cos2 - red version

Bass: Select with X on cos2 - no shirt

Bayman: Select with X on cos1 - blue hat

Lei Fang: Select with Y on cos1 - white version, Select with X on cos1 - blue version, Select cos1 while holding L - black version

Helena: Select with X on cos2 - black version

Ayane: Select with X on cos2 - white version

Cool move:
With some characters (Tina and Brad Wong), if you punch your opponent into the air then you can execute a throw on them while they're falling to the ground.