Slither.io is a popular online multiplayer game developed by Steve Howse in 2016. It is a game where players control a snake-like creature and try to become the largest one on the map. The game is very simple, yet addictive and can be played on any device with an internet connection.

The goal of the game is to grow your snake by eating brightly colored pellets that are scattered throughout the map. The more pellets you eat, the longer your snake becomes. The longer your snake is, the easier it is to encircle other players and force them to run into your body, which will make them disappear and leave behind more pellets for you to eat. This is the primary strategy in the game, and the more players you eliminate, the higher your chances of becoming the largest snake on the map.

The game is played in real-time, which means you'll be competing against other players from all around the world. You can see other players' snakes on the map and avoid colliding with them, as that will cause your snake to explode into pellets that other players can eat. You can also use your snake's speed boost to escape danger or chase down other players.

As you play, you'll notice various power-ups that appear on the map. These power-ups can give you an advantage over other players, such as a speed boost or an immunity shield. However, they only last for a limited time, so you'll need to use them strategically.

Slither.io has simple and colorful graphics that are easy on the eyes. The controls are straightforward, and you can use either the keyboard or the touchscreen to control your snake. The game is free to play, and there is no need to download any additional software.

In summary, Slither.io is a fun and addictive game that can be played by anyone. It's easy to learn, yet difficult to master, and provides hours of entertainment. The game's simplicity and fast-paced action make it a great way to pass the time and compete against players from all over the world.