New adventures from The Magnus Archives creator Jonathan Sims—plus new lore and new options for GMs and players. With a complete corebook FREE with every pledge, it's a great jumping-on point if you're new to the game!

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.