There is no key present in the game, there isn't even a key for that door in development tools.

Behind the door there is a fully completed cave, but not much interesting things in it, as I recall. There was supposed to be something interesting inside, but are only few wolves and coins.

But if that door was unlocked, I probably wouldn't even noticed it's some unfinished level. They probably just forget about it.

Well if you really want to search the cave, you can just unlock the door using the command line.

Doesn't one of the Oblivion mods fix all that kind of stuff? Unofficial patches mod or something like that. (They had one for Morrowind as well I think).

Maybe. I'm not that interested to have things restored in game or to explore every cave in the game.

I was just frustrated how they could just do this and never finish it even with patches.

I don't have OCD, I don't need to go everywhere, I just don't want to be reminded "this is just a buggy game that wasn't even finished".

They didn't even care enough to either remove the cave or unlock the door. It shows laziness or disrespect for the audience. That's it.

You mean after all the care that has obviously been put into the game, one non-unlockable door (and bear in mind that you wouldn't even know it can't be unlocked if you didn't look it up, you'd probably figure it's part of a quest and forget about it. I suppose that's what I did.) means they're lazy and don't respect their audience? They probably just forgot about it, that's pretty damn easy to do in a game of such a scale. They could have fixed it in a later patch, sure, but then again - there are much more important things which need fixing. If TES was the only game which screwed up in this area, eh, sure, you'd be right. But even Fallout had quite a few flatout unfinished bits. A lot of games do.

Did you play any of the Shivering Isles?

I'd be interested to find out what you might have thought of that. It's still got the flaws of Oblivion, but it's certainly a more interesting setting.

... AND it's got Sheogorath. But yeah, it does seem like what Keevek is asking for - Oblivion's freedom condensed into a very small world, with more or less everything being very strange and outlandish. Even moreso than in Morrowind.

And with some consequences to some of your actions now that I think about it.

I am a silly little man

It's nice to throw spoilers around when OP hasn't played the expansion yet :-P

whops.. sorry.... did not think there

There we go, I have only spent 4 hours modifying Oblivion and generating my own distant lands, and now I have just about the best sandbox RPG in history on my harddrive. All I've had to do was to install 29 plugins including a crash preventer and a stutter remover, no idea how the fuck do they work but they do. See? No hassle at all!

In 4 hours I can lead Borussia Dotrmund through half of the season... :P

^^^ this. I really did enjoy Oblivion, Fallout 3, Morrowind... but I'm having trouble starting Skyrim, not sure why though. But for whatever reason, despite the hiccups here and there, I really did enjoy the way the games FELT. Maybe its just because that's how I tend to play games ("no stone unturned"), but I love games that just let you wander around and explore. Hell, I do that in World of Warcraft just to see whats out there. Sometimes nothing, sometimes a goofy pop culture reference, sometimes its just an out of the way bit of architecture...but its still fun just to go LOOK, you know?

It is a better setting, for sure, but all the other flaws are just insurmountable for me at this point I think.

4 hours? Pfft! I spent close to 3 weeks researching, studying the readmes and testing out mods in an attempt to create the perfect Oblivion for myself. IT was a lot of work but the payoff is I now have the closest I have ever been to a perfect Action RPG.