S.T.A.L.K.E.R.: Shadow of Chernobyl
This distortion of the noosphere powered by C-Consciousness and the machinery it was connected to created the anomalies and many of the mutants that inhabit the Zone in 2012. Desperate to correct its mistake and in order to shield itself from outside interference, especially the meddlesome "Stalkers" beginning to appear in the Zone, the C-Consciousness created an "Alien Monolith" in the center of the gutted Reactor 4, and used its ability to affect the minds of normal humans to create the "Monolith" cult, a group of heavily armed zealots whose tenets included worship of the Monolith and the prevention of "heretics" from approaching the remains of Chernobyl. They converted the Steel Yard radar facility near Pripyat into a powerful "Brain Scorcher" that would blast the mind of any unprotected human who approached too close, turning them into mindlessly aggressive zombies (while allowing C-Consciousness to select some individuals to brainwash into new members of Monolith). Finally, they used some of their agents (former Stalkers spread throughout the Zone) to disseminate stories of a "Wish Granter" at the heart of Chernobyl, ensuring that anyone who did manage to evade both the Monolith faction and the Brain Scorcher would be drawn to the Monolith and disposed of, rather than discovering the existence of the C-Consciousness lab.