Clement Darling is the true main villain and antagonist in The House of the Dead: Overkill. Clement was the warden of a jail, beneath which the U.S government had constructed a vast underground laboratory where it was conducting secret research with a view to creating stronger, more resilient soldiers. The project was eventually forgotten about and the laboratory remained sealed under the prison until Clement discovered it. After Agent G and Detective Washington defeat 'Mother', Clement begs them to allow him to be at peace - by returning to his mother's womb.