Paper.io is a multiplayer online version of the classic snake game in which you have to try to conquer as much land as possible to try and defeat other users.
How to Play:
Just closing a territory with your line to make it yours, but at the same time you should avoid bumping on the lines of other players as you'll die.
Game play:
Besides the challenge of playing in real time against other users you have extra motivation as trying to be in first placr on the leaderboard on the screen.