[Newworlds]

Another way is to hire them as an intern or as a service worker (donated time with non pay). When someone is working for you you even without pay in the field of the arts their work is automatically the ownership of the entity they are working for.

For example. An intern working for Industrial Light and Magic cannot take or use the work they do for ILM even if they are not being paid as long as it is clear they are working for ILM when they create their art and creating rooms, descriptions, story lines WITHIN your game or directly for your game falls under that category as long as they are listed as an intern, work for hire, service worker, donated time, etc.