The game Death Mark is a Japanese horror-adventure game set in Tokyo's "H" district. Rumours spread about people receiving a death mark, which causes them to die suddenly. The main character, a middle-aged man with memory loss, is one of the unlucky recipients of this mark. He arrives at Kujou Mansion , a mysterious villa where he meets a creepy doll-like entity who offers him a solution to get rid of his death mark. However, there's a catch: he must find out why he has the mark in order to do so. The player must travel with a partner who also has a death mark and solve their problems together before time runs out.
The gameplay of Death Mark revolves around navigating the mysterious world of Kujou Mansion, interacting with its eerie inhabitants, and uncovering the truth behind the death marks. The game features visual novel elements, where the player's choices affect the story's progression and multiple endings.