Here are some cheats and tips for the game Darius Gaiden.
Do the following tricks at the Game Start/Options screen.
Very easy and abnormal modes:
Press and hold X, and press Z, C, L, B, Left, R, L. The Options menu
now lists two new skill settings, Very Easy and Abnormal.
Auto rapid fire mode:
Press and hold B, and press Y, Right, Left, X, Z, L, and R.
More credits:
Press X, A, L, R, Left, then press and hold L, and press X, C, Z, A,
Right, Right. Now you will have nine credits.