Lexine had an apparent immunity to the effects of the Red Marker and experienced odd headaches and bouts of nausea on the Ishimura. She accompanied the survivors to the USG Ishimura in the hopes of finding refuge from the terrors spreading through her home. Lexine Murdoch - The girlfriend of Sam Caldwell, Lexine is a surveyor on Aegis VII present during the second Necromorph outbreak on the colonized planet.Throughout the first chapter, the player controlled Sam as he tried to reestablish the power and life support to the colony during the unexplained murders of his teammates and the miners down in the Megavents.

Sam Caldwell - A playable character for the first chapter, Sam is an engineer on Aegis VII tasked with removing the Red Marker from its pedestal.The story intertwines with the story of Dead Space and sheds light on the certain events of the plot. Set in the year 2508, the story follows a group of four survivors, Lexine Murdoch, Nathan McNeill, Gabe Weller and Warren Eckhardt who try to escape the nightmare of the Necromorph outbreak on the Aegis VII colony and the USG Ishimura. Dead Space: Extraction takes place prior to the events of Dead Space.

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