Da

DOSGames.com Review:  Rating: 4
Da is a Tetris / Columns type game which attempts to mash the two games together and add new features. Named after the author (Michael Heyda) you drop blocks like Tetris to clear rows, but you can also clear blocks by matching three or more of the same color, as each block is comprised of three different colors. Clearing by color can sometimes hurt your progress as it can leave blocks hanging in the middle of the well. There are a lot of other options available, like a variety of different blocks (most unwieldly) and custom well size. There's even two-player simultaneous mode! It looks and plays pretty well considering it's done in text mode. Note that you'll need a keyboard with a numeric keypad to play.