Hey there, can you suggest some 3rd person action games for me, please? The only requirements I ask you to consider is that it was released between 1994 to 2004 and released on Windows.

Think along the lines of American Mcgee's Alice, Star Wars Jedi Knight: Dark Forces II and Vampire The Masquerade.

It does not have to be a pure action game, the behind the back 3rd person camera is the most important part.
It does not have to be available on GOG either.

It may seem like an odd request but I have played tons of RTS and FPS games, I would like to play some more third person games.

Please, feel free to list as many as you like and thank you in advance for your suggestions :D

Have you tried these games?
Max Payne
Max Payne 2
Hitman Codename 47
Hitman 2 Silent Assassin
Oni

X-COM Enforcer, Tomb Raider, Prince of Peria, and Legacy of Kain come to mind

Great suggestions man I totally forgot about the Hitman and Max Pain series! I always wanted to play those games as a kid but wasn't allowed too XD

I have played Oni on ps2 back in the day and loved it I might have to revisit that as well.

Thank you for your help! If anything else comes to mind please feel free to post again :D I have never tried the X Com but I will be sure to look into it :D Prince of Peria and Legacy of Kain were both awesome. I had Kain for Dreamcast man I miss that console :P

Rune
Jedi Outcast
PoP: Warrior Within
are three excellent ones here on gog. Not as excellent imo, instead more funny and weird, but still very good are:
Giants
Armed and Dangerous

Beyond Good And Evil
Mafia
Heavy Metal FAKK 2
Splinter Cell

Shadow Man
Bloodrayne 1 & 2
The Suffering & The Suffering: Ties That Bind
Overlord & Overlord II
GUN
Messiah
Sacrifice
Rogue Trooper
Saboteur

Definitelly Heretic 2. Giants, Armed & Dangerous and MDK series (I personally prefer MDK2, but both are worth checking).

Also Wallace and Gromit: Project Zoo and Enclave (second one is quite hard though; and W&G is rather 3D platform game, but anyway, I would recommend it).

I cannot recommend the Saints Row Series enough.

Oh, I can abuse the chance to shamelessly promote my 3rd person, open world with character creation games mix (not all action games) :P
https://www.gog.com/mix/third_person_open_world_charcreation_games

Ops... That teaches again to only do one thing at once... and it answers my question why it have not been suggested already.

So are Overlord & Overlord II, Rogue Trooper, GUN and The Suffering: Ties That Bind.

Awesome suggestion dude! I saw my friends brother playing Heavy Metal FAKK 2 years ago and could never remember the name of the game until I looked up your suggestions thank you so much! Sacrifice looks dope :D Also I love The Suffering games, thank you for your suggestion man! MDK is one of my favorite games. I Can tell you are a man of good taste :D Giants really caught my eye. Thank you for your time :) Thanks for replying! Armed and Dangerous looks pretty damn cool :D I might have to check out PoP if its weird enough to get a laugh, I always enjoy bizarre stuff (Might be why Harvester is one of my favorites).

Serious Sam 2

Psychonauts. One of the best games ever made.

trailer - https://www.youtube.com/watch?v=md_8uDtbffQ