Outlast: Whistleblower sets the stage for the chilling narrative of Mount Massive Asylum, serving as a prelude to the events of Outlast. This full version adventure game delves into the unsettling story of Waylon Park, a software engineer contracted by the Murkoff Corporation. Unable to even reach his family due to stringent security measures, Waylon's growing distrust of the unethical practices within the asylum leads to a series of events that expose the dark secrets lurking within Mount Massive.

Waylon's journey unfolds as he navigates the treacherous corridors of Mount Massive, encountering profit-driven scientists and doctors engaging in perilous experiments on patients. Through his actions, the sinister core of the asylum is unveiled, setting the stage for a harrowing exploration of horror and deception.