After dealing with members of the Circle, as well as their own insanity, Isaac and Carver find a new ShockPoint Drive, but Isaac is now losing his mind. However, within the halls of the old Sovereign Colonies ship, they encounter the remnants of the Circle who've taken refuge inside and begun a new following in the name of the Necromorphs. Once boarding the Terra Nova, Isaac and Carver must find a way to restore power to the derelict CMS Terra Nova and find a new ShockPoint Drive in order to return to Earth. It can only take them to the CMS Terra Nova. After witnessing many ships lift off, they find out that the ship's ShockPoint Drive is missing. They then found out about a Unitologist ship that can take them back to Earth. After finding out that the Marker signal was still causing insanity, suicide and Necromorphs, they battled through more of the threat that Isaac and Carver had just faced.

After the battle with the Brother Moon over Tau Volantis, Isaac Clarke and John Carver wake up on the surface of Tau Volantis, shocked to find out that after falling to their near death, they are still alive, they then make their way across the surface of the frozen planet, finding memories of the horror they had experienced.

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