Teeth: Blood Cotillion is a grotesque, single-session, standalone table-top roleplaying game for 3-6 people (including the GM).
It is set during a single night at a high-society ball, in a cursed corner of 18th-century England. The players are formidable assassins, disguised as husband-hunting ingenues, who must root out the occult evil that lurks in the manor, destroy it and, ideally, survive.
The game uses a simplified version of the Forged In The Dark rules to tell this troubling story of peril and unpleasantness, and is designed to be played in a single session. It should take between three and five hours to play, during which time the ball goers will make horrifying decisions to achieve their victory over the supernatural, and also over polite society.