"Clean" Pause  
Press Select when the game is paused.

Play As Ayane  
Get each outfit in the game.

Play As Raidou  
Beat the game with each character with the default settings.

Replay  
Press and hold Square+Circle and press Triangle right before the victory pose. Keep holding Square+Circle and press again after the victory pose.

Play Against Ayane  
Defeat Kasumi in less than 5 minutes.