?-99 appears to have a similar appearance to A-99 except it noticeably has sharp white teeth in its tall black eyes and a black frowning mouth with a dripping effect on its appearance and a small glitch effect. ?-99 will appear next to the door, preventing you from passing on in a few seconds before disappearing around 50 seconds. ?-99 however cannot attack you, it just blocks door. Players can punch the entity to reduce its lifetime.