Here are some cheats and tips for the game Thunder Force 3.
Super weapons:
Pause game play and press Up(10), B, Down(2),
and repeatedly tap B to fill the weapon meter. Press A
for the Claw weapon, and resume game play. Note: This code may
be enabled with each new life.
Hidden options:
Hold A + B + C and press Start
at the title screen to display a menu with ship speed, difficulty,
and sound test options.
Alternate ending:
Press C during the ending sequence. Your character
will wave and wink.
Two-player mode:
Use two controllers to share control, with one player flying
and the other firing the weapons.
Shoot all weapons:
Continuously tap C while pressing B to fire
all weapons at once. Note: This is best accomplished by using
a auto-fire controller with C set to rapid fire.