Use the following links to download it now and give Valve's 'Left 4 Dead 2' PC game a fresh, new horrifying sound & look.
VPK Add-On Version:
Bilian's L4D2 Sound & Music Mod Plus v1.1 (VPK Version)
Manual Replacement Version (for even more customizable options):
Bilian's L4D2 Sound & Music Replacement Mod Plus v1.1
Latest video featuring sound replacements for "The Sacrifice" DLC:
6 other videos demonstrating in-game sound & music changes: