Substratum Protocol: An Apocalyptic Mystery Game

When an anomaly emerges at the Earth’s core, the Substratum Protocol is activated. As a member of the elite Substratum Expedition Team, you must descend into the planet’s depths to uncover its secrets and stop the apocalypse. Survival isn’t guaranteed, and every step reveals new horrors and mysteries lurking beneath the surface.

Survive, Discover, and Save the World

Key Features:

• Solo or group play for 1–6 players, with optional GM-led sessions.
• Deep delving mystery inspired by *Subnautica* and *In Other Waters.*
• Step-down dice and card draw mechanics for dynamic storytelling.
• Blend of exploration, survival, and cosmic horror at the planet’s core.
• Face alien creatures, scientific puzzles, and harrowing challenges.

Descend into the unknown, face unimaginable dangers, and uncover the anomaly’s truth. Will you save the Earth—or be lost to the horrors below?