Eretzvaju - The Japanese name for the Playstation game that got renamed to "Evil Zone" for the US release. Infamously known as the two-button fighting game. The two buttons (attack and block) seem inadequate, but deliver a lot of moves. Between two good players, it's like playing an anime like Dragon Ball Z (minus the grandiose attacks). Not deep, but super fun.
Grey Ninja, Samba De Amigo is only my favorite music/rhythm game of all time (yes, even over DDR). You have two maracas and on-screen you have three circles stacked vertically on both your left and right. Balls appear from the center and will gravitate to one of the cirles. You have to hit the maracas at the proper height the second the balls hit one of the circles. At some point, you'll have an on-screen prompt to "pose" in which case you have to place your maracas at the same height as the character on-screen. Songs such as Ricky Martin's "Cup of Life", the theme from Austin Powers, the Macarena, and a remix of Aha's "Take on Me" make an appearance. There was an import-only Samba de Amigo 2000 release that had even more songs, and more modes of play. Consider yourself deprived (Sin and Punishment-deprived) if you've never played it.