Claustrum is a short-session online game which takes place in various types of labyrinth tunnels and is a mixture of game mechanics. We are heading for common realism of action, a large number of our own features, and locations in different settings, ranging from battles in weightlessness to ancient tombs. Release will contain only one type of a map - Catacombs, but in several versions. Their total length is over 70km. Maps are separated by a variety of passages and secret paths, so there is a place for fans to crush by force and for hidden murders! If we collect more donations than planned, we will issue 2 type of maps at once.