Sublustrum - Official Open Playtest Trailer

Watch the latest trailer for Sublustrum, a psychological adventure exploring memory, perception, and the subconscious. The new trailer reveals Nicholas Boulton as the voice of the Professor and showcases new locations, strange machinery, and intricate puzzles built around observation, experimentation, and careful listening. In Sublustrum, you search for your missing scientist brother while descending into a surreal world where sound, mechanisms, and fragmented memories become part of the mystery. Sublustrum will be available on PC. An open playtest runs from October 12 to October 25, 2026 on Steam, and you can request access if you're interested. The open playtest features Chapter One.