Bible Black: La Noche De Walpurgis is the all time best selling eroge visual novel. For those that don't know, eroge is shortened version of the two words erotic and game. It's just like how anime is the shortened Japanese version of animation.

An adult-oriented adventure game. The Kitty Media version features the original Japanese voices along with English translation. This game is 100% uncensored.

There is a legend on campus of an underground room where debaucheries and magic rituals once took place. The room was supposedly sealed off after a human sacrifice. As the thirteenth anniversary of this grisly event draws near, someone is plotting for history to repeat itself. Minase is a mild-mannered junior who never thought twice about magic or campus legends, but then he finds the mysterious "Bible Black." Will he be tempted by the dark path of debauchery, or will he use his power to stop the upcoming sacrifice?

Make your choices wisely, as each choice could leave to one of twelve different Endings.

Thou shalt not suffer a witch to live.
Every one that lieth with a beast shall certainly be put to death.
He that sacrificeth to any god, save unto the LORD, shall be devoted to destruction.
Exodus 22:18-20