Tetris and Dr Mario (Super Nintendo, 1994)

Dr. Mario has players moving falling pill capsules to wipe out different colored viruses positioned somewhere within a well. Once you match three colors together (either horizontally or vertically), the virus disappears. Remove all of the viruses and play resumes on a faster, more difficult level. Want to compete against a friend, but can't agree on which game to play? One player can play Tetris on one side while the second plays Dr. Mario on the other! You can then see who's better in a three-round timed challenge. Solo players need not worry -- there are three different computer opponents to face.