Slither.io Game Play Video
Play Slither.io Online, a snake game like Agario where worms must eat light to grow and can’t touch the others, except when they become growing bulbs too. A single mistake is enough to make a giant turn into nothing and lead to game over, even against the smallest player, granting this latter a chance of becoming stronger and faster without effort. Focus on the lights and microorganisms along the way, forget about the others except when you’ve got enough length to trap them in circles. Note that it’s possible to cross ways with your own body, without punishments.
Make sure you disable any other slither.io extension and scripts first!
How to install user scripts?
Firefox and related browsers: Greasemonkey.
Google Chrome, Chromium, and related browsers: Tampermonkey.
Opera (version 15 and later): Tampermonkey or Violentmonkey.
Opera version 12 and earlier supports user scripts natively. Violentmonkey provides a friendlier UI and better compatibility.