A killing spree is horrifying enough. When all eight members of the Ridgeway family are gunned down by a math student who then kills himself, Delta Green sees hints that make it more terrifying still. Your Agents have to stop the madness before it spreads. The Last Equation is a full-color scenario of personal apocalypse and lethal mystery. It is playable with Delta Green: Need to Know or Delta Green: Agent's Handbook, available from Arc Dream Publishing.