Although match-3 games are really a Tetris variant, they have a category to
themselves because of their enormous popularity. All of them "Bejeweled" clones,
they spice up the dumbly addictive tile-switching to make threes in a row with
pretty graphics, catchy music and/or sound effects and a back story to make it
seem like anything other than a fun waste of time. To keep the player awake,
match-3 games will often have other types of game between levels.