Play as Orochi Team 
     Hold  Start  button while selecting Yashiro, Shermie and Chris to
play as their alternate forms.

Team / Single Attack modes 
     Beat  Team  Mode as any team, in any difficult setting, and using
as many Continues as you need to enable Team Attack.
     Beat  Single Mode as any character, in any difficult, and with as
many Continues as you need to unlock Single Attack.

Unlock Gallery pictures 
     Beat  a  character  in  Single Attack to unlock the corresponding
picture in the Gallery.

Unlock Kusanagi 
     In Challenge mode, beat mission 20 in Time Attack to unlock Kusanagi.
     To play as Kusanagi, select Kyo while holding the Start button.

Unlock Shingo 
     In Challenge mode, beat Single Attack to unlock Shingo.