1- First you need to copy this console command for this to work.

• bind f3 thirdpersonshoulder;c_thirdpersonshoulderoffset 15;c_thirdpersonshoulderaimdist 720;c_thirdpersonshoulderdist 40;c_thirdpersonshoulderheight 1;cam_ideallag 0;cam_idealpitch 0;cam_idealyaw 0

You can replace f3 with any key you like, but i prefer f3.

2- After copying the command just open you're console and paste it there, and we're done now join any game and press "F3", and you should be playing in third person.

=============================(Optional)==============================
You can change the value of these parts to control the cam up and down, left and right.
"cam_idealyaw 0" & "cam_idealpitch 0" & "c_thirdpersonshoulderheight 1"

Example : "cam_idealpitch 3;cam_idealyaw -3;c_thirdpersonshoulderheight 2"

For Better experience i recommend using INSTANT_WORLDMODEL_TURNRATE script by H.U.N.K. and Third Person Shotgun Sound Fix by Unique Horn.
Notes :

• The more you miss with the cam the more you lose accuracy, i found that these settings works the best, it's not possible to to have 100% accuracy in third person even with mods, because the game was not meant to be played in third person.

• This method works online & offline, but doesn't work in versus.

Please if you find the guide helpful favorite + reward, for more guides.


Also see my other
Left 4 Dead 2 - Addons - Third Person - 3ps - fov - tp - Spray - Mutation - Versus Player - Custom- Artwork - Image - Custom - Spray - VTF - Spray Left 4 dead - Graffiti- Versus Mods - Versus Not Working - Addons Versus - Versus Addons - Add-ons - Fix - Change - Edit - Make - Config.