The Queen of Duellist
A fighting game that's probably one of the worst ever published in terms of gameplay. You select from one of two girls and participate in a Street Fighter-esque tournament in which the loser gets her clothes ripped off. Unfortunately, in order to see boobies, you must set the difficulty fairly high, to a point where the AI spams projectile attacks that you can't avoid, but sort of makes up for this by allowing you to punch or kick your opponent even if you're almost halfway across the screen from your opponent. This game was re-released with an updated version that fixes most of the bugs and adds better sound effects and more hentai content, but the gameplay is still very shoddy to the point of making it nigh unplayable.