Rolling Thunder 3

This third entry in the Rolling Thunder series follows a new agent, Jay.

Japanese Release Mode?/Alternate Logo/Alternate Title Screen
The game fixes bit 5 of byte $D7(a6) to 1 on startup. If you force it to 0 by patching out the write with 392:4E71, 394:4E71, and 396:4E71, some parts of the game change: Text remains in English.
 * the Namco screen reads "NAMCOT for Sega Mega Drive" as with Namco's Japanese releases (this most likely means that the bit turns on a Japanese region mode; Rolling Thunder 3 was not released in Japan)
 * the namco logo animation was also changed somewhat?
 * the game's logo resembles that of Rolling Thunder 2
 * the title screen has a logo animation resembling that of Rolling Thunder 2
 * the title screen was changed somewhat? not sure
 * some predefined passwords are changed (see below)

Unused Checksum Error Screen
Using patch code 38B:1A (Gens/GS) on startup will bring you to a screen that says nothing but "IT'S A BAD ROM." and hang the game. This screen doesn't actually check the ROM; it's just what would appear on a checksum error. The game does not check its checksum.

Predefined Passwords

 * Some of these passwords have been previously documented elsewhere; this is a full list.