The Fortress of Varnolis – an adventure with a first-person view. The player takes control of a boy trying to escape a terrifying nightmare living in a vast and mysterious castle. The main character will reveal secrets hidden in the darkness for many years. The mystical journey is filled with jump scares and puzzles that are solved by interacting with the world.

The boy woke up in the deep corners of the ancient Fortress and does not remember how he ended up here. The environment immediately seemed unfriendly to him, so he decided to find a way out and escape. However, the more he explored the Fortress, the more he realized that there was no way out. To stay alive and return home, he must uncover long-buried secrets in the darkness, encountering paranormal phenomena and ghosts.

The gameplay includes elements of investigation, where you will need to fight the horror in which the central character woke up. The gamer will have to maneuver in dark underground labyrinths and solve logical problems, encountering monsters and fighting them. By revealing forbidden secrets, there is a greater chance of further salvation. The main task is to make your own way to the top of the ancient dungeon and be free. The user can collect notes and fight dangerous ancient creatures.