Ethan Carter is one of the first Unreal Engine 4 games on Playstation 4 (aside from Daylight and Ether One). To achieve this, The Astronauts actually provided an upgrade from the game's original PC release which shipped using Unreal Engine 3. According to the development team, they chose to do this for additional effects and to offer further improvement, but also [...] Via The Vanishing of Ethan Carter PS4 - Expansive