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. Delta Green: Observer Effect is playable with Delta Green: Need to Know or Delta Green: Agent's Handbook, available from Arc Dream Publishing.