Thunder Force IV

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Thunder Force IV
Also known as: Lightening Force: Quest for the Darkstar (US) Developer: Tecnosoft Publisher: JP Tecnosoft US/EU Sega Platform: Genesis Released in JP: 24 July 1992 Released in US: 1992 Released in EU: 1992 This game has a notes page

These apply to the Japan ROM

Demo recording?

5B88:4E71 skips over a jump that changes the text PRESS START in the demo gameplay to JOY REC. The jump takes effect if word $FFF2FE <= 0; there is code to clear and a lot of other tests of that value...

Debug printing?

$3D56 checks word $FFF066; if != 0 then it prints some strings TEKI: MAP: SAX: SAY: EASY NORM HARD MANI - is this debug? The address is the first entry in a table jumped by the game at various points (at the start of a level) but IDK how to get word $FFF272 (the index) to be 0...

Well-known secrets, not sure if they belong

• all weapons cheat
• OMAKEBGM songs (are these on the OST?) when you win
• gamefaqs lists a 99 lives cheat that looks suspicious