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.

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

Beat the game as Zool and Extal to play as Neco.

Beat the game at least once. Then at the Character Selection Screen, hold Select and press any direction on the D-pad, plus Square, Triangle, Circle Or X. The colors will change depending upon the combinataion of buttons you use.