During the concept phase there were four people working on the Hitman Go.[13] Initial prototypes were built on paper using printed out characters.[14] The project was pitched and greenlit for production in mid 2013.[1] Daniel Lutz served as creative director,[1] and the team size peaked at eleven people throughout the remainder of the game's development.[13] The studio looked at several different engines for building the game, but opted with Unity early on as it had a low barrier of entry, provided support for the main mobile platforms, and some members of the development team had previous experience creating projects in the game engine.