L4D2 The Passing Solo Expert No Deaths

Unbelievably hard, thanks to that panic event at chapter 2 and the fact that SI spawn every few seconds on the finale. All it takes is a smoker and it's a wrap.
0:00 Intro
0:12 Chapter 1: The Riverbank
3:13 Chapter 2: The Underground
11:09 Finale
18:34 Credits