First you read some thing about .io games what is .io games, As you have notice in some of recent months several massive multiplayer games have been created by developer's and 90% domain's end with .io extension so they called .io Games.

It makes it super simple to play, but very complicated to become the best. It allows the player to increase his authority in the game or in comparison with other players. For example in agrarian, the more mass you consume the bigger you do and you increase of ranking in the game.

Here is Some Best .io Games

Slither.io
An addictive game where you control a snake and eat other players.

Diep.io
Shoot your opponents to get points and upgrade your tank.

Limax.io
A colorful blend of slither.io and agar.io. Very entertaining to play with friends!!

Braains.io
Escape the zombies and get points to buy new weapons.

Splix.io
A fight for territory. Try to conquer as many squares as you can.

Mope.io
Mopeio is another Popular .io game.

These are my best games if you like any other game like Run 4 mention in comment.

Also i mention my youtube video check out.