The Story Behind No Mercy
10:39
The Story Behind Crash Course
7:57
The Story Behind Hard Rain
28:43
This Achievement in Left 4 Dead Showed Me NO MERCY
50:23
The CREEPIEST Left 4 Dead Analogue Horror Series You've Never Seen...
18:54
the entire story of Left 4 Dead, i guess
12:41
The Story Behind The Sacrifice
37:18
All L4D2 Mutations Reviewed
20:54