Play similar online multiplayer fun games like Agar.io here on Brightestgames for free. Click to play Slither.io games on vitalitygames.com. In Slither.io you will not be eating smaller opponents, but you will want to avoid any head-on collision with other snakes. If this happens, you are automatically knocked out of the game and you have to start all over again. Holding down the left mouse button will temporarily increase the movement speed of your snake. Will you succeed among the tough competition and will we see you on the leaderboards for the best players? Have fun.