Use the Thunder Force III ship in Thunder Force IV
Clear every stage in Thunder Force IV using only one credit. After the information is saved, you will be given an special access code. Input the code at the Thunder Force IV title screen to use the STYX fighter.
Contributed By: NeoSigma.
Lightening Force: Quest for the Darkstar Cheats
At the Title Screen, wait for the words ''Press Start'' to appear. When they do, press A and Start simulanteously. Go to the config screen and set ''Stock Ship'' to zero. Start the game and you'll now have 99 lives.
Contributed By: KRaffa.
Enter the following code at the Pause Screen....
Up - Right - A - Down - Right - A - C - Left - Up - B - Up
When you un-pause the game you should have all of the weapons
Contributed By: Mike Truitt.
Complete the game once on any difficulty. Then go to the options screen (A+Start during the opening or title screen) and go to the Music option. You will notice that in addition to the added staff roll and ending songs, you also get to listen to 10 really cool songs that can't be found anywhere else in the game.
Contributed By: Ryu Hayabusa.
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