The Agents investigate a cutting-edge physics laboratory that may have looked a little too deeply into the roiling chaos of reality. Chaos looks back. The Olympian Holobeam Array, funded in part by the U.S. Department of Energy, was built to delve into a fringe theory of physics. It uses highly classified technology that its parent company developed in conjunction with the U.S. military. A few hours ago, the Holobeam Array went online. A few minutes ago, it went offline in a catastrophic power surge. Its engineers soon restored power and communications. Its lead researcher said everything was fine. Delta Green, a secret agency dedicated to investigating, stopping, and covering-up deadly incursions of unnatural forces, had reason to suspect otherwise. It immediately pulled strings to launch an emergency inspection, sending the players' Agents to investigate, under cover of a Department of Energy safety inspection. The Agents have no idea what they'll find when they reach the Array.
A secretive research company has developed a miracle drug, only to learn that every miracle has its price. Delta Green agents may be the ones to pay it. Delta Green: Extremophilia brings the agents to Helena, Montana, where people are going insane and dying of a bizarre fungal infection. But this is no fungus that ever evolved on Earth. It's something far older, far stranger, and far more dangerous. Can the agents stop the spread of this terrifying threat? Or will they become just another vector for the disease? Gather your players. Horror, suspense, intrigue, death, and strange wonders await.