Dead or Alive 3

To unlock Kasumi's 3rd costume successfully complete exercise mode in sparring mode.

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

To get a different costume for Ayane, Bass, Brad, Christie,
Hayabusa, Hayate, Helena, Hitomi. Highlight their second costumes, then prss X.

When you highlight the first costume for Bayman press X.

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.