Slither.io
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The objective of the game is to control and move a snake around a colored area, eat pellets to gain mass, defeat and consume other players to grow the biggest and longest in the game. If the player's snake's head collides into a part of another snake, the player loses the game and must start over. The defeated avatar's body turns into bright, shining pellets for other players to consume. By pressing the space bar or clicking the mouse, the player can activate "boost mode", which causes the snake to speed up. When a player does use "boost mode", the snake loses mass causing the snake's size to shrink slightly. The drawback is that the avatar will lose some length while being speed-boosted.