It's more Rainbow Six than Vegas was, for sure. Still a little dumbed down, but I think, in spirit, it's Rainbow Six. Most tense fun I've had in a while.
I wish I had recorded it, but we had a match as defenders where we just annihilated the attackers. It was 4v1 and we were nice and cocky, absolutely positive we had a win.
Then this Solid Snake motherfucker proceeds to do some guerrilla warfare shit. Almost all of us were defending the one objective at the upper floor, with many of our windows still barricaded. He used that to his advantage, blowing breaching charges to distract us while popping into other windows and taking us out.
He eventually cleared us all out
It was terrifying.