Adult craniopagus twins aged 29 years who succumbed to the surgical separation are being presented posthumously. Neuroimaging studies had revealed a total type 3 craniopagus with a common superior sagittal sinus beginning at its distal half and draining into a common Torcular Herophili. In July 2003, neurosurgeons at Singapore embarked on the mission to tackle the separation of the most complex and challenging adult craniopagus of the present millennium, unfortunately ending up with devastating results. The authors intend to expand upon their life style, shared intracranial structures, the potential risks of a one-stage procedure as carried out in this case and finally offer some suggestions in tackling such rare and complex cases in neurosurgery.