Scarecrow Mansion is an estate owned by Thornheart, and the main setting of House of the Dead: Scarlet Dawn. Appearing to be an opulent mansion on the surface, the building houses an underground laboratory and research facility; here, Thornheart developed his "Noah's Ark" project to decimate humanity with his mutant creations, thus completing Dr. Roy Curien and Caleb Goldman's legacy. 

On December 6 2006, AMS agents Kate Green and her partner Ryan Taylor infiltrated a dinner party at Scarecrow Mansion. When Thornheart unleashed his creations upon guests, Kate and Ryan blew cover to protect them. They ventured through the mansion grounds and laboratory, discovering the truth about "Noah's Ark" while killing Chariot, Hangedman, and Priestess. Thornheart was confronted in a church; the agents defeated another creation, the Moon, while Thornheart escaped to further his plan.

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