Slither.io
MultiplayerDetailed description
In Slither no matter how big you are you can always eat or be eaten by a bigger/smaller opponent, its all about how you path which can make you either a dangerous encounter or snake food.
Instructions/How to play
Your snake is fully controlled through mouse movement, its head will follow your cursor across the screen. Your snake can also be sped up using the space bar however this will gradually shorten your snake if used for too long.