Hello everybody!
Like many people here, I used to play in this awesome game when I was just a kid. It brings so many memories...
I have only one question - are there servers with the original campaigns?
Years ago there were two (or maybe more, I am not sure) servers called Wargamez (or something like that). They contained two campaigns with three missions per each campaign. The XPs were saved for all three missions and with the start of a new campaign the XPs were reset.
I would love to play on the servers similar to this... I'm totally not a fan of all mods and custom maps...
Someone please make my dreams come true and tell me that there are servers like the old Wargamez!

https://et.splatterladder.com/?mod=serverinfo&idx=770031
https://et.splatterladder.com/?mod=serverinfo&idx=768130

Hirntot server has 6 original maps and then 2 custom ones (frostbite and venice/et_beach/missile_b3) in rotation as the last 2. The XP is saved through the entire campaign, and reset next campaign.
https://steamcommunity.com/sharedfiles/filedetails/?id=2801141726
Only real players, no bots :)