The amount of computer games produced has increased drastically over the last ten yearsand so has the production costs within game development. Many game developers spenda lot of time creating intuitive tools to improve the work flow of the game creation process.An example of these tools is a level editor which serves the purpose of creating contentfaster, easier and with minor or no programming experience at all. How important aretools when it comes to game development? What positive effects may tools have on aproject? What is the impact of quality and complexity of the tools on a game project?Does quality and complexity have any major influence?This thesis analyses, tests, and shows different implementations of tools for game development in order to find their significance in the game production pipe-line and whatrelationship tools have to the total production cost of a game project.