Outlast is a psychological-survival horror video game, developed and published by Red Barrels, an independent company founded by people previously involved in the development of video games such as the famous Prince of Persia, Assassin's Creed, Splinter Cell and Uncharted.

It was released September 4, 2013 for Microsoft Windows, PlayStation 4 was initially planned to be released in 2014, only to bring it forward to 5 February of the same year. The game was available for free to subscribers to the PlayStation Plus service, and pay for all the others.

On May 6, 2014 was released for Microsoft Windows and PlayStation 4 downloadable content Outlast: Whistleblower, a prequel to the original game.