Whe i press play i just get a black screen.
After surviving 2 days
YOU ARE DEAD.
(Well kind of, you're a zombie now)
Who's going to play Left 4 Dead with me on launch day?

I had 2 survivors at the bottom of the barricade with Uzi/Ump iirc and I was middle, the zombies all started moving to the top where it was undefended, I just lobbed nade after nade after nade kept doing this throughout the final stages of the game