I've finished the game?

[Raoabolic]

There are credits at the end of an expansion. There are credits after the x.3 patch which concludes the story arc for that expansion. There are credits right before the next expansion. Repeat.

The story that comes after the credits is not a side story, but the next chapter of the main story.

*breathes heavily*
It was a joke. I-I'm sorry, man. I'll just leave now.