Fox Engine

The Fox Engine is a discontinued proprietary game engine by Konami. The engine's development began with Hideo Kojima after the completion of 2008's Metal Gear Solid 4, with the goal of making the "best engine in the world." The first commercially released title to use the Fox Engine was Pro Evolution Soccer 2014. The engine was designed to make it possible for Kojima Productions to develop multiplatform games with a significantly shortened development time and has been described as the first step for the developer to move away from development for a single platform. The engine is named after FOX, a fictional military unit from the Metal Gear series, wherein is also a reflection of Kojima Productions itself, which based its company logo on FOX's fox emblem. After seven years of use on the Pro Evolution Soccer series, Konami discontinued use of the Fox Engine in favor of Unreal Engine due to PES Productions focusing development efforts on the PlayStation 5 and Xbox Series X consoles.