Originally Posted by kalniel
There is nothing stand alone about it. It's an expansion pack to Wings of Liberty and according to them you need the base game in order to play the expansion.

Interesting. I haven't paid much attention since finishing (and being disappointed with) Wings of Liberty, but that's something that's definitely been changed since their original announcements about SC2. It was originally made to sound as if it was going to be 3 separate games.

Still, it didn't need to be an expansion that would require Wings of Liberty. I think the reason for that is obvious.