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.

Play as a Gnawborn, a small but valiant creature from the forests of Hyhill in the world of Akeroth. Tired of your quiet life, you've decided to embark on an epic journey. Your path is fraught with danger, wonder, and self-discovery.