December, 2001. The convulsions of America's post-9/11 war on terror have only begun. But worse threats still lurk in the shadows.

Delta Green knows.

The gruesome, ritualistic killing of Randall Tebbs outside Phoenix, Arizona bears unwelcome resemblances to a mass murder in 1994 Chicago. Delta Green already has a suspect in mind. But the Agents are on the ground only a few hours when things get worse. The suspect reappears only to destroy himself in a deadly explosion. The murdered victim speaks with the voice of a god.

A trail of carnage leads across the country. It draws the Agents inexorably to the city where the towers fell, the city where cruel powers converge: to New York, the city Delta Green has learned to fear.

When Delta Green stumbles into a clash between the Great Old Ones themselves, can the Agents hope to survive?

Holy War can be played with Delta Green: The Role-Playing Game or the free quickstart rules in Delta Green: Need to Know. It makes a perfect companion to the 1990s sourcebook Delta Green: The Conspiracy. Further operations are available from Arc Dream Publishing.

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