The Walrider, also known as The Swarm, is the main antagonist of Outlast. It is the source of the madness that seems to infect most of the asylum's inhabitants and the deity of Father Martin's religion and his followers. While appearing ghostly in nature, the Walrider is actually a swarm of nanites; small, nanoscopic machines which collectively possess great strength and power.
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Doug Jones
Javier Botet
Joseph Bishara
Mark Steger
Troy James
Alexander Ward
Andy Serkis
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