On December 7, 2017, Red Barrels posted an update on their future plans, which included Outlast 3 and an untitled Outlast-related project that was in the works. Reagents can interact with Murkoff employees to obtain the items that they will need for their next trial. In between the trials, Reagents return to the Sleep Room, where Murkoff takes good care of them. Inside the warehouses, Murkoff has constructed heightened lift-sized models of real-world environments. Imprisoned in a secret Murkoff facility comprising a dozen warehouses and connected by underground tunnels, players will be thrust into a series of physical and mental ordeals, tormented by iconic characters, and challenged alone or in teams to survive with their sanity intact.

The game is set in the same universe as other Outlast-related titles and takes place in the year 1959, during the height of the Cold War era, where players take on the role of test subjects-referred to as Reagents-abducted by the Murkoff Corporation. Trial: Kill the Snitch is the first Trial in Program 1, and often the first trial done by new Reagents (Aside from the tutorial).

Trials are completed solo or in a group of up to 4 other Reagents.

The Outlast Trials contains trials, the trials are 'missions' in which Reagents have to complete objectives in order to gain rewards and to get further towards their Rebirth.

Outlast trials multiplayer