The Adventures of Tintin: Prisoners of the Sun (Game Boy)

Tintin: Prisoners of the Sun
Developer: Bit Managers Publisher: Infogrames Platforms: Game Boy, Game Boy Color Released in EU: 1997 (GB), September 8, 2000 (GBC) This game has hidden development-related text. This game has a hidden sound test. This game has a hidden level select.

Sound Test

Game Boy	Game Boy Color

At the title screen, highlight Start, hold Up and press A or Start.

Level Select

Game Boy	Game Boy Color

At the license screen, press B, A, Up, Down, Right, Down, A. A sound will confirm correct entry. Start the game, pause, and press A + B to access.

(Source: cah4e3)

Development Related Text

Two bits of development related text in Spanish can be found at the following locations:

0x3C7E2

Original	Comment translation
JR Z,$SOLO1 ; Solo necesita la primera envol	You only need the first envel

Most likely that this is one line of the Sound engine source code, so the cut off word "envol" may refer to "envelope".

0x3FA71

Original	Translation
Final de la rutina de musica	End of the music subroutine

This is some kind of end of the file mark in the assembled code. All data past this string in the ROM is unused garbage bytes. So they may check how many free bytes are left after assembly.