One common feature of many RPGs is the role of gamemaster, a participant who has special duties to present the fictional setting, arbitrate the results of character actions, and maintain the narrative flow.  In tabletop and live action RPGs the GM performs these duties in person. In video RPGs many of the functions of a GM are fulfilled by the game engine . However some multi-player video RPGs also allow for a participant to take on a GM role through a visual interface called a GM toolkit , albeit with abilities limited by the available technology.  
A project manager is a professional in the field of project management. Project managers are in charge of the people in a project. People are the key to any successful project. Without the correct people in the right place and at the right time a project cannot be successful. Project managers can have the responsibility of the planning, execution, controlling, and closing of any project typically relating to the construction industry , engineering, architecture, computing , and telecommunications. Many other fields of production engineering, design engineering, and heavy industrial have project managers.