I have a pretty wimpy laptop. Not as wimpy as your machine, but close. I'm interested in legacy games too. It sounds like we have most of the same ones. The cut off is about Quake 4 for my laptop. It pretty much dogs.
Still, we must have missed something fun 5 years ago... but maybe not
I really liked the original Warcraft better than the weirdness (and $$$$) Warcraft became. You just aren't gonna get me for a monthly fee to play a video game.
I'll pop $50-$80 bucks for a video game, but you aren't gonna get $200 a year. That's just silly.
Openarena has some active servers. That's half way decent jokes.