It is complicated. Many games license art works from third parties, in which the game house agreed only to use that art work in one game title. E.g. a sound t

It is complicated. Many games license art works from third parties, in which the game house agreed only to use that art work in one game title. E.g. a sound track on a game may feel like a small part of the whole game, but it can the complete work from a music producer.