Tetris 2 (NES)

My favorite game ever, of any kind, is Dr. Mario. I think the vast amount of time I have dedicated to that game has made me mildly worse at this one.

Instead of how normal Tetris works, where you want to build solid horizontal lines of blocks at the bottom to make them disappear, in this one, you get blocks (yellow, blue, and red) with black circles in the middle to begin with (randomly arranged) and you get Tetris blocks made of different colored blocks (also yellow, blue, and red) to drop on them. You want to match three blocks in the same color in a row to make them disappear. The goal is to make all the original blocks with the black circles in them disappear to move on to the next level.

Dr. Mario has made me worse at this one because of the very slight differences. Both games use the same mechanic, goal, and three colors (and both have good music!), but Dr. Mario has pills of two "blocks" each while Tetris 2 has shapes of four blocks each, and Dr. Mario calls for four in a row to make them disappear and Tetris 2 calls for three in a row.