8 Ball Pool used to be the shit back in the day , all before it got on Facebook.
holy fuck what a good game thanks for the memory
geogussr but you have to pay which is shit but still worth it
Achilles was a nice game...
Tanki online before it went shite
skribbl.io with hltv users
diep.io was one of my favorites back in the day
agar dot io
GOAT game , nothing comes even close
you can argue flash games , but agar took browser games too a new level , crazy how in 2015 it was everywhere and it was addicting , started the io games field
sucks that it died because moneyclip could care about it no more
HaxBall or cityquiz.io (nerd game)
Plazma Burst 2
Empires and Allies