Software developers working on complex systems design know that choosing the right tools, methodology and framework is a key step to ensure that system will work. Video games are without a doubt one of the most complex software systems currently existing and being worked on. Authors have conducted a thorough survey and study to determine major game development methodologies that are currently being employed by industry professionals. Among them, systems development, gameplay mechanics, data driven, and continuous iteration are the most used ones. In the process of research Unreal Engine and Unity Engine were selected for practical study. Software code and figures presented in this paper are based on Unreal Engine 4.