Outlast: Whistleblower (also known as Outlast: Story DLC) is a first-person survival horror video game DLC (Downloadable content) for Outlast, developed and published by Red Barrels Games. It is the prequel to Outlast, revealing the reasons of the Mount Massive Asylum outbreak. It also shows the true ending to the asylum after Miles' (implied) death. It was released for PlayStation 4 and PC on May 6th, 2014, and for Xbox One on June 19th, 2014.