Gradius Collection

Gradius III has unlockables. You must complete the following tasks and finish your game. That means if you don´t die, you won´t unlock anything, even if you have a saved game after completing the task. You should be careful too: If you load a game without a now unlocked feature, you will lose it again if you finish your game.

Effect - Code

Cube Attack - Survive until level 9. It´s the cube attack from level 9.
Extra Edit - Complete the game. You will be able to choose more weapons in Extra Mode.
Extra Mode - Survive until level 9. Here you will see most of unlockables.
Gradius - Get hit by a shot of the last boss. It´s part of the first level from Gradius.
Salamander - Get hit by a shot of the last boss. It´s part of the first level from Salamander.
Stage Select - Complete the game.