SNES[edit]
30 Lives[edit]
At the title screen, hold left and push 
three times.
Konami Code[edit]
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[edit]
At the options screen, press 16 times in 1 second. The game will be harder.
Increase credits[edit]
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[edit]
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[edit]
In Edit Mode, press , 
, , , , . Your weapons will be selected randomly.
Bonus stages[edit]
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.
PS2/PSP[edit]
Konami Code[edit]
Pausing the game and entering 
, , 
, , 
, 
, , , 
, 
will give all weapons plus Double. Replacing the last two buttons with 
and 
(
and 
in PS2 version) gives the Laser instead.
Cube Attack Mode[edit]
To try the last part of stage nine, beat stage 9 in order to unlock this mode in "Extra Mode" .
Gradius Mode[edit]
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[edit]
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[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".