Tetris (Japanese: テトリス, Hepburn: Tetorisu) is a puzzle video game developed and published by Nintendo for the Game Boy in 1989. It is a portable version of Alexey Pajitnov’s original Tetris and it was bundled with the North American and European releases of the Game Boy itself. It is the first game to have been compatible with the Game Link Cable, a pack-in accessory that allows two Game Boy consoles to link for multiplayer purposes. A colorized remaster of the game was released on the Game Boy Color titled Tetris DX (テトリス デラックス, Tetorisu Derakkusu). A Nintendo 3DS Virtual Console version of Tetris was released in December 2011, lacking multiplayer functionality. The game was released on the Nintendo Switch Online service in February 2023.

Dr. Mario is a 1990 puzzle video game developed and published by Nintendo for the Nintendo Entertainment System, Famicom, and Game Boy. It was produced by Gunpei Yokoi and designed by Takahiro Harada. The soundtrack was composed by Hirokazu Tanaka.It is a falling block puzzle game, where the player’s objective is to destroy the viruses populating the on-screen playing field by using colored vitamin capsules that are automatically tossed into the field by Dr. Mario. The player manipulates the falling capsules, to align the same colors, which destroys viruses. The player progresses through the game by eliminating all the viruses on the screen in each level.