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 original book of old-school RPG traps returns for 5E and DCC RPG! A compendium of catastrophic traps, sinister snares, engines of evil, and deadly devices with with full game stats for a folio of fearful fates.