Sunless Sea: Zubmariner is an addition to the top-down role-playing adventure with horror elements Sunless Sea. If the original action took place on the surface of the water, then in the addition you will plunge into the dark and dangerous depths. While sailing on a submarine, you will have the opportunity to visit the new city of Wrack, built from the wreckage of sunken ships, and you will have to navigate using the built-in sonar.
The add-on requires the original version of Sunless Sea.