-The world is in total chaos...

-When you're indoors in most campaigns, you will hear distant explosions that rattle the building's infrastructure instead of creaking and metallic shaking.
-A distant air raid siren can be heard in the Sacrifice. This is representative of the downfall of the east coast's military evac zones that is implied in The Sacrifice comic.
-Some unused ambient loops have been changed.

-Further replacments made to directory "ambient/random_amb_sfx". Changes are most notable in the L4D1 campaigns.

-Three ambience loops have been replaced with better-quality ones.
-Over 15 custom files in directory "ambient/random_amb_sfx" have been replaced to avoid duplicative work.

-Made replacements to almost all of the game's rain loops and storm soundscapes.

-Several sounds have been redesigned to reduce the number of duplicates. Otherwise, these are very minor changes and this will likely be the last update to this VPK (I mean, actually).

-Increased volume levels of all custom rain loops.
-Updated several ambient loops.
-Added reverb to "ambient/random_amb_sfx/wood_debris_0(1-8).wav"

-Putting this version out to test if the engine error of the Nov. 25 patch has been fixed.

-Updated over 20 sound files in folder "ambient/random_amb_sfx".

-After almost a year of no changes, over 100 sounds have been added/changed to the folders "ambient/random_amb_sfx" and "ambient/ambience". For those unaware, these two folders respectively hold some of the game's BG noises and ambient loops.