At the Dragon Buster title screen press Select 10 times then start the game. When your vitality drops to 32 or below, press L1 + R1. Your vitality will rise to 128 and you will lose one credit.

Load the game DRAGON BUSTER and press TRIANGLE to access the dipswitch #5 in the "SW2" box and press X to turn it "on." Now start the game. When the map screen appears, hold L1 + R1 + CIRCLE and advance Clovis to either of the first two dungeons on the map. Instead of entering the dungeon, you'll be warped ahead to Round 2. You can continue to advance to higher rounds as you hold L1 + R1 + CIRCLE; when you reach the round you'd like to start on, just release the buttons and you'll be able to enter the dungeons normally.

In any game, press SELECT while playing to gain an extra credit.

Load the game GAPLUS and press TRIANGLE to access the dipswitch #4 in the "SW3" box and press X to turn it "on." Now start the game. When the words "Parsec 1" appear on the screen, hold L1 + R1 + CIRCLE and press START; a stage-select number will appear at the left side of the screen. Press UP or DOWN to change the number of the stage you'd like to warp to, then press START to begin at the stage you choose.

When the Grobda title screen appears, hold L1 + L2 + R1 + R2 then press Start.

Load the game MAPPY and press TRIANGLE to access the dipswitch screen. Highlight switch #5 in the "SW3" box and press X to turn it "on." Now start the game; you can skip stages at any time by holding L1 + Ri and pressing X.

Load the game SUPER-PAC MAN and press TRIANGLE to access the dipswitch #6 in the "SW3" box and press X to turn it "on." Now start the game. When the word "Ready!" appears on the screen just before the characters start to move at the beggining of any stage, quickly hold L1 + R1 + CIRCLE and press START; The screen will flash just like it does when the stage is cleared and you'll advance to the next stage. Repeat the process for each stage to skip to any level.