[quote name='chimpster1313']2 Hours Later.......
The campaign is pretty fun. It's 3 levels, and the run to the safe room at the end of level 2 is going to be a SON OF A BITCH

ING CUNT when trying to beat it on expert.
Also, the mutation that's up right now is Realism Versus. This is also pretty difficult, but I had a lot of fun with it, despite the epic lag that me and my teammates suffered throughout.
Finally, the one playthrough of the campaign that I did had
as the character who died. I think it changes every time, but just in case, I spoiler'd it. Have fun, all of you who plan to purchase it today. I had a lot of fun with it and I'll be revisiting it throughout the rest of the day.[/QUOTE]
I wonder if beating it on expert realism would trigger the achievement? It'd be nice to do a level that only has 3 parts.