Agar.io
krunker.io
Krunker.io is a free io Multiplayer First Person Shooter. No Download browser FPS! Free!
16,692 
$ 804,240.00
splix.io
The not so latest trend in io games. Conquer as much land as possible and try to become biggest of them all. It's not a bowl.
33,064 $ 406,080.00
agariohub.io
Play agario with no lag in the best agario server! No registration needed, xp system, chat, skins and a lot of different gamemodes and features!
98,917 $ 136,080.00