A team from the Aegis VII colony including Sam Caldwell transport the Marker into the colony. During the transport, the crew suffer hallucinations, and Caldwell kills his team mates when they seemingly go mad and attack him. After receiving a call from his fiancee Lexine about a mass suicide of Unitologists, Caldwell is shot dead by a security squad led by McNeill, who perceived his behaviour as an insane rampage. A week later, as McNeill is investigating recent similar incidents, Weller arrives and asks for his help securing the bodies of the suicides. After reaching the morgue to find it empty, they discover that the colony's residents have gone insane, forcing them to repel the colonists and then growing numbers of Necromorphs. The pair find Lexine and later Eckhardt, witnessing a shuttle crash destroying all the colony shuttles and trapping the colonists with the Necromorphs.
Dead Space: Extraction is a science fiction rail shooter video game. Taking the role of multiple characters across the campaign, the player navigates through the Aegis VII colony and the mining ship Ishimura from a first-person cinematic perspective. The original Wii version controls using the Wii Remote and Nunchuk, incorporating both motion controls and an option to use the Wii Zapper. In the PlayStation 3 (PS3) port, the controls are altered to support both the DualShock controller and PlayStation Move. In contrast to the diegetic UI design of the original game, players can press a controller button to display weapon slots, current ammunition and health in the screen corners.
Source: Wikipedia, "Dead Space: Extraction", available under the CC-BY-SA License.