

That sounds a bit strange, the source code for nearly every script that handles quests, mechanics and such is bundled with the game and what modders have been using since release.
Unless I’m misunderstanding something, I don’t see why a remaster like Oblivion’s would be impossible. It runs on top of the original game anyways.







The script source code is packaged with the game though. You can see the entire game’s implementation through the GECK and XEdit pretty much.