Zapper.io

The free IO game Zapper.io may be played online and is rather popular.
As you compete to become the largest snake on the board, your objective in this game is to defeat all of your opponents by attacking and destroying them. You will compete against gamers from countries all around the globe. To become the most powerful player on the map, you must first eliminate all of the other competitors in the area.
Let's get a game going here.