Outlast: Whistleblower

Whistleblower is DLC for Outlast and acts as a prologue set just before the events of the original game as well as an epilogue. After the introduction the story soon runs parallel with the main game. The player takes on the role of software engineer Waylon Park, the man who tips off Miles Upshur, the protagonist of the main game, about the events in the Mount Massive Asylum. (mobygames.com)