I have both L4D and L4D2, however I feel that L4D is WAAAAY worse than the second, and that calling the second an expansion is just a bit off. I'd call it 'almost' an expansion, but a severe improvement either way.
As for New Nuper Nario Nuhsast NIII, I'm not surprised.
As for New Nuper Nario Nuhsast NIII, I'm not surprised.