Mahjong Chinmoku no Hentai
A military faction has kidnapped your girlfriend. Using your choice of military vehicles, you strike back at girls in tanks to fight your way through Japan to rescue her. Sounds violent. It's not. It's strip mahjongg, and in an amusing twist, after you strip the girls and blow up their tanks, further penalties are generally metaphoric for bukkake, such as tanks that drive up and spray the girl with white liquid. The game's title is probably a parody of the manga "Chinmoku no Kantai".