ALTERED BEAST 
Sega 

  : 
     A   Start. 

 Options menu:
  B   Start   . 

  : 
  "Options menu",      ,      A + Start   ,     . 

  :
  A + B + C + Down/Left   Start   . 

 Sound test:
  A + C + Up/Right   Start   .

  : 
  UP ()   .

  : 
    START+B. 

