Oblivion is also on PC as well, if you prefer - but you'll need a VERY good PC to run it.

I suggest buying TES 3 Morrowind for PC though, because the console version is nowhere near as good graphically, and it's nowhere near as demanding as Oblivion.

The TES series has never had an MMORPG and I hope it never will. I like the option to play a game the size of an MMORPG without it being full of other players. After all, you get a lot of players in them whose only goal is to cause trouble and disturb your enjoyment of the game.