S.C.I.: Special Criminal Investigation (TurboGrafx-16)

S.C.I.: Special Criminal Investigation
Developer: Taito Publisher: Taito Platform: TurboGrafx-16 Released in JP: January 25, 1991 This game has hidden developer credits. This game has hidden development-related text. This game has a hidden sound test. This game has a hidden level select.

Hidden Text

Stored at x1158C in the ROM:

1989-07-12 N.KOSHINAKA

Given that the previous game has the exact same string, it is possible it is a leftover.

Cheat Mode

At the title screen, press I 4 times, II 4 times, I 3 times, II 4 times, I 5 times, and II 4 times to activate a handful of cheat functions:

• Press Select: Go to the demo screen
• Hold I and press Select: Sound Test (pictured above)
• Hold Left and press Select + Run: 256 credits
• Hold Down and press Select + Run: 256 turbos
• Hold II and press Select + Run: Level Skip (press I+II+Run during the game)

(Note that the latter three functions can be activated simultaneously by holding down all of the corresponding buttons and pressing Select + Run.)

(Source: yamada_arthur)