Anyone play old games? (mostly from the 80s, 90s or 2000s)

I sometimes play old games like old first person shooters, like counter strike 1.6 or doom for example

they're all pretty good and hell, i thought of trying doom multiplayer since i heard it's possible to play the classic ms dos doom in an online multiplayer server (servers like deathmatch and such), though probably with a source port with it too

but i wanna hear y'alls favorite old video games, it can be about anything really.. fps, platformers, anything lol

--NF