Maximum energy bar size
Press [Start] during game play to pause the game. Highlight the "Sound FX" option on the menu. Press [Square], [Circle]x2, [Triangle], [X]x2, [Circle], [Square]x2, [Triangle], [Square]. A sound will confirm correct code entry.

Maximum energy
Press [Start] during game play to pause the game. Highlight the "Sound FX" option on the menu. Press [X], [Triangle]x2, [Circle], [X], [Triangle]x2, [Circle], [Square], [Circle], [X]. A sound will confirm correct code entry.

Three continues
Press [Start] during game play to pause the game. Highlight the "Sound FX" option on the menu. Press [Triangle], [Square], [Circle], [X], [Triangle], [Circle], [Square], [X], [Triangle], [Square], [Triangle]. A sound will confirm correct code entry.

Full life
Press [Start] during game play to pause the game. Highlight the "Sound FX" option on the menu. Press [X], [Triangle]x2, [Circle], [X], [Triangle]x2,[Circle], [Square]x2, [X]. A sound will confirm correct code entry. A sound will confirm correct code entry. Alternatively, enter "VONLUX" as a password.

Weaken the virus
Press [Start] during game play to pause the game. Highlight the "Sound FX" option on the menu. Press [Triangle]x2, [Square], [Circle], [X], [Triangle], [Circle], [Square]x3, [X]. A sound will confirm correct code entry. The red bar at the top of the screen should shorten, allowing more time to explore the game for hidden bonuses and rooms.

Jump to the next stage
Press [Start] during game play to pause the game. Highlight the "Sound FX" option on the menu. Press [X], [Square], [X], [Triangle], [Circle], [Square], [X], [Circle], [X], [Triangle]x2. A sound will confirm correct code entry.

Jump to the next world
Press [Start] during game play to pause the game. Highlight the "Sound FX" option on the menu. Press [Circle], [X], [Triangle], [Circle], [Square], [Circle], [X], [Square], [Triangle], [Circle], [Square]. A sound will confirm correct code entry.

All weapons
Press [Start] during game play to pause the game. Highlight the "Sound FX" option on the menu. Press [Triangle], [X], [Circle], [Square], [X], [Square], [Circle], [Triangle], [X], [Square], [Circle]. A sound will confirm correct code entry. Alternatively, enter "HUIBON" as a password.

Unlimited ammunition
Press [Start] during game play to pause the game. Highlight the "Sound FX" option on the menu. Press [Triangle], [Circle], [Triangle], [X], [Square], [X], [Circle], [Square], [Triangle], [X], [Square]. A sound will confirm correct code entry.

Automatic recharge for certain weapons
Press [Start] during game play to pause the game. Highlight the "Sound FX" option on the menu. Press [Square], [X], [Circle], [Triangle], [Circle], [X], [Square], [Triangle], [Circle], [Triangle], [Square]. A sound will confirm correct code entry.

Secret level
Enter the "COMMANDO" as a password. Your character will be teleported to a ring to fight various opponents.

Ninety-nine blue time chips
Enter "ACTIVATE" as a password.