Where does this notion come from? You are seriously mistaken about how copyright works. Your example of ripping a game's soundtrack (and I assume distributing,

Where does this notion come from? You are seriously mistaken about how copyright works. Your example of ripping a game's soundtrack (and I assume distributing, as per the example we are discussing) is absolutely not OK. Similarly, game assets tend to be copyrighted, and it doesn't really matter if you are "plopping into that level", or that it's "just the level assets". The copyright owners are entirely within their rights to request it be removed, and I'm sure would have a pretty good case if taken to court. Inb4 anyone assumes that I dislike this project, or think it should be taken down, I can assure this isn't the case.