Tetris (Game Boy)

Tetris
Developer: Bullet Proof Software Publisher: Nintendo Platform: Game Boy Released in JP: June 14, 1989 Released in US: August 1989 Released in EU: September 28, 1990 This game has unused sounds. This game has revisional differences.

The Game Boy version of Tetris is a very famous rendition and the system's pack-in game for American consumers. The game was so popular, it led to the Game Boy being a major success for Nintendo.

Unused 1.0 Level Up Jingle

Version 1.0 has an unused level-up sound. Game Genie code 084-F5D-E62 will replace the existing sound upon leveling up.

(Source: nensondubois)

Revisional Differences

Version 1.0 was only released in Japan as part of a Special Link Bundle, and is estimated to have sold around 25,000 copies. Version 1.1, used for the rest of the print run and released internationally, contains the more widely-recognized A-TYPE music and is overall a slightly more polished game.

Copyright Screen

v1.0	v1.1

Hyphens were added between "Bullet" and "Proof". Also, the copyright screen is displayed for just two seconds in v1.0; this was extended for v1.1 to eight seconds, although pressing Start after four seconds will take you to the title screen.

Music and Sounds

v1.0	v1.1

The A-TYPE song in v1.0 is Minuet. For v1.1, the tune changed to Korobeiniki, which essentially became the Tetris theme.

v1.0	v1.1

The "level-up" sound was changed from a simple beep to a short jingle.

Level 9

Version 1.0 requires you to score 20 lines on Level 9 to proceed to Level 10. This was changed for v1.1 to 100 lines. This was presumably done as if the player started gameplay on Level 9, they would reach Level 10 as soon as they scored only 20 lines. On V1.1, this advance does not happen until you have scored 100 lines (much like most other versions of Tetris).

Block Rotation Glitch

Version 1.0 lets you rotate a block while clearing a line, multiple lines, or a Tetris if there is room in the playing field.