An engine created by Guerrilla Games for Killzone, and later used for Horizon Zero Dawn, that was simply called "the engine" till Hideo Kojima choose to use it for the creation of Death Stranding. The name Decima was quickly decided on as a reference to the ancient trade relationship between the Netherlands and Japan. Kojima Productions was given a copy of the engine's source code and is now collaborating with Guerilla Games on the future of its development.