Substratum Protocol RPG thrusts you into a desperate expedition to the Earth's core. As part of the Substratum Expedition Team, you are one of the last scientists on Earth, tasked with understanding and stopping a mysterious anomaly that threatens to unravel reality. Explore the depths, gather clues, and formulate "The Last Hypothesis" – your plan to save humanity from the brink of apocalypse.

This survival role-playing game combines hard science fiction with cosmic horror elements and utilizes unique dice and card drawing mechanics. Play solo or with 2–6 players led by a Game Master. With 10 sectors to explore, 120 unexpected events, and 36 clues to discover, the game offers endless mysteries and challenges in the pursuit of answers.

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