Bonus Game
To play three levels of the classic shooter "Phalanx", hold Select
+ Start on Controller Two while turning on the Playstation.
Use Controller Two to play.

Computer vs. Computer
To see two computer-controlled opponents fight each other, try
this. At the title screen hold L1 + L2 + R1 + R2. Hightlight
"Player 1" and hold Down. The cursor should be on "Vs. Play". With
all these buttons held, press Start