Need game suggestions for my graphics card

Hello everyone! I have an older graphics card that I mainly just use to dual monitor. It is just a geforce 8800 ultra. I was wondering if someone could suggest some games that I could download and play online that people still play? Have an AMD Athlon II x4 640 @ 3.0ghz
12GB RAM
GeForce 8800 Ultra
Thanks!
Answer #1
Counter-Strike Source, League of Legends, Dota 2, Path of Exile.
Answer #2
My spiral knights recommendation couldn’t be missing such a question . It’s a simple MMORPG with childish as some would say graphics but i like it, even though i haven’t played for like a year! Hell i haven’t even finished mark of the ninja(that’s a single player but great game) yet! should be half way through i guess. Incase you try it (spiral knights) throw me a pm and if i have the time i’ll help you there where i can.