Korobeiniki is the song included in many Tetris games, and in all games that follow the Tetris Guideline. There are some variations. Tetris DX has an unused version of Korobeiniki.

Tetris at tetris.com uses three versions of this song.

Traditionally, this song was called Korobeyniki and it is a Russian folk song. Tetris (Game Boy) made this song a part of the Tetris Guideline, and a registered trademark of TTC (77037539). Another name for this song was Korobushka. Korobeiniki is the preferred spelling, used by TTC.