Collection of Graphic Mods (97)
This collection is designed to improve textures, sharp edges, lighting and effects.
As well as fix a bunch of visual bugs.

Collection of Sound Mods (16)
This collection includes improving sounds, adding missing ones.
As well as fixing the most annoying sounds.

Collection of Gameplay Mods (11)
This collection is aimed primarily at fixing dumb bots and then replacing some animations with better ones.
As well as expanding voice dialogs.

Collection of Interface and HUD Mods (5)
This collection includes the improved original HUD and icons.
As well as fixes for a lot of old flaws.

I'm going to add in the near future.

This guide is ideal for those who want to improve Left 4 Dead 2 while maintaining the original atmosphere and aesthetics of the game. With minimal changes, you will get a modern experience from the classic game.