The traps that he set up in advance throughout the Conning Tower were designed to prevent the progression of the SCAF personnel from reaching him, with explosives rigged on the vents at any given areas to trigger attacks by the Necromorphs on board the ship. A remorseful Commander Valery Dietz attempted to kill Edwards under orders, but he shot her first and prepared for the soldiers that would pursue him. All of the personnel were ordered to execute the crew, destroy all of the data, records and communications structures and commit suicide. In 2314, the Terra Nova was disabled by the ' Scenario Five' contingency, ordered by General Spencer Mahad. And if any of them jacked-up jarheads try to come for me, they'll be sorry too.' -Tucker and Valorie's last conversation, heard in an audio log. '*Loud gunshot is heard, followed by the commander's body collapsing.*' 'It means you have to die, we all do! If we don't, he'll just send someone to do it for us.'

'Scenario Five?! What the hell does that even mean?!' 'We're facing a Scenario Five situation.' History Events of 2314 ' I-I'm sorry Tucker, but you heard Mahad's announcement.'

Dead space extraction chapter 5