This is why I also said the intellectual property owner might... which would be the company which has the rights to the System Shock or Thief franchises. Good reasons stated but alas if they had contacted someone part of the clause can be to not publicly announce they have been contacted. When I beta tested then later coded for the Battlefield 1942: Star Wars mod, LucasArts got in touch then sorta did a professional job and released Star Wars Battlefront. In this instance it wasn't a cease and decist, but in part a blessing to continue provided it was not for profit and if I recall, everything had to be built from scratch without lifting any models or skins etc from elsewhere. I never played Battlefront, but in the mod which came before it (and probably inspired it, unless LucasArts were already working on it unannounced) I basically spent 6 weeks or so pimping out the X-Wing alone before moving on to other things. It was my idea and code for example, to have an opening and closing canopy albeit I had to bug the modeller and skinner to butcher the original model for me to work with I also added fully functional landing gear but IIRC I never got around to uploading the files before I sold my PC so the landing gear never made it to a public release If they were unreleased on any format and the legal threat was high I'd be an advocate of releasing them regardless of the repercussions, though I have nothing thus nothing to lose. The games are unreleased on Dreamcast... but not unreleased in general. As they are playable on other format(s) and would take a riduculous amount of time to make them workable with the added threat, however small, of legal action from Sega or the rights owners IMO the juice isn't worth the squeeze.