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- Debug Mode
- To enter a special debug mode, wait for the Core Design copyright message to appear,
then press Up, Down, Left, Right, Down, Down, Right, Right, Triangle. You will be
taken to a test menu where you can choose your starting level, max your firepower, view
all the videos, see the credits, and improve the game's appearance.
- Invincibility
- Start a game and quit by pressing START+SELECT. At the main title screen press UP, UP,
UP, DOWN, DOWN, DOWN, RIGHT, RIGHT, TRIANGLE. You will hear a chime.