Resident Evil 6 X Left for Dead 2

[Mass Distraction]

I think I'll take this as a standalone game, otherwise it's obvious to see that fans of the two series are going to find flaws.

Let's see how it stands on its own two feet

Oh, but it won't. It will stand on stilts, the other being RE6 and the other L4D2. All this is is merely additional characters and enemies available in the parent games.

I'd love a full crossover though.