Gradius III/Secrets

30 Lives
At the title screen, hold left and push three times.

Konami Code
To kill yourself, pause the game and press, , , , , , , , ,. To receive one Speed Up, any Missile types, four Options, and any shield types, replace left and right on the Konami Code with and.

Arcade Mode
At the options screen, press 16 times in 1 second. The game will be harder.

Increase credits
At the title screen, press rapidly. After 10 button presses the credits will increase by 1. Make sure you move the cursor up or down or the demo will start and the credits will be reset to 4 when you return to the menu. You can increase your amount of credits/continues to a maximum of 9.

Insane demo screen
At the title screen, hold until the demo screen begins. You will see a playthrough of the first stage on a really hard level.

Random Weapon Select
In Edit Mode, press, , , , ,. Your weapons will be selected randomly.

Bonus stages
To find out on how to acsess the stages, see the walkthrough of the stages. The bonus stages are similar to the MSX Gradius' bonus stages.

Konami Code
Pausing the game and entering psx: up dpad, psx: up dpad, psx: down dpad, psx: down dpad, psx: left dpad, psx: right dpad, psx: left dpad, psx: right dpad, psx: S, psx: T will give all weapons plus Double. Replacing the last two buttons with psx: L1 and psx: R1(psx: C and psx: X in PS2 version) gives the Laser instead.

Cube Attack Mode
To try the last part of stage nine, beat stage 9 in order to unlock this mode in "Extra Mode".

Gradius Mode
At the final boss, if you get hit by the bottom energy ball, you play a bonus stage based off the first stage of Gradius. Acsess that to unlock this in "Extra Mode".

Salamander Mode
At the final boss, if you get hit by the top or middle energy balls, you get sent to a bonus stage based off the latter half of stage 1 from Salamander. Acsess that to unlock this in "Extra Mode".

Extra Edit
To unlock this, you must beat the game. This allows you to select ALL weapons, plus some from the SNES game. This is also in "Extra Mode".