want to play online in some old games like test drive unlimited or need for speed 2010 or unreal tournament 2004 or quake4 or quake wars online or any other not demanding games from 1996 to 2015 years

who wants to join and explain how to setup online in them?

we can play together

Go on Steam and check out Quake Live. Might be in your preference, just make sure to research active player count etc. There is also Age of Empires 2 DE.

Quake: https://store.steampowered.com/app/282440/Quake_Live/

AoE2DE: https://store.steampowered.com/app/813780/Age_of_Empires_II_Definitive_Edition/

For player count: https://steamcharts.com/