It still very much depends on what the actual copyright is and where you live as well though. Because isn't part of it do not reverse engineer this game. (Rigging the models would more than likely be counted.) Although I think that Oddworld being the company that they are, (about the little guy) wouldn't mind, so long as it isn't made for "Ground and mashed into little cakes. Scrabs destroyed for profit sakes." Sorry that came to mind when I was going to say profits sakes. But yeah free fan based game should be all good with them.
__________________
|