Slither.io is a popular multiplayer casual game in which players control a worm-like creature in a game world where the object is to make the worm as long as possible by consuming pellets and other players' worms. slither.io's gameplay is straightforward and easy to pick up. Players start the game as small worms, and their goal is to eat as many pellets as possible to grow into larger worms. Pellets appear randomly in the game world, and the more pellets players eat, the bigger their bugs get. The bigger the worm grows, the more points the player gets. Players can also consume other players' worms to get bigger quickly. However, this comes with the risk of being eaten by other players themselves.

Slither.io features a virtual world that is open to all players, and there is no limit to the number of players that can participate in the game. The game world is full of obstacles, and players need to guide their worms through them to avoid hitting them. If they hit an obstacle or another worm, the player's worm will be destroyed and they will need to start the game from the beginning. The game controls are easy to master. Players use the arrow keys on the keyboard or use the touch screen on their mobile device to control their worms. Players can speed up their worms by holding down the spacebar, but this comes with the risk of losing length as the worms get smaller. slither.io offers a variety of skins and customizations that players can use to personalize their worms. These skins and customizations can be purchased using in-game coins that players earn by playing the game. These skins range from simple colors to more complex designs such as superhero-themed skins. one of the unique features of Slither.io is the leaderboard. The leaderboard shows the top players in the game based on the length of their bugs. The leaderboards are updated in real time and players can see how they rank against other players.