When the anomaly appeared at the Earth's core, the Substratum Protocol was initiated. You are the best and brightest scientists we have left, our last hope to stem the apocalypse. You are the Substratum Expedition Team. Descend. Learn. Survive.

The Cypher System is about to become your new favorite TTRPG. With a new Starter Set, a DELUXE Cypher System Rulebook, and two striking new genre books, this campaign has something for everyone—new fans and Cypher System veterans alike!