slither.io

Slither.io (stylized as slither.io) is a multiplayer online video game available for iOS, Android, and web browsers, developed by Steve Howse. Players control an avatar resembling a snake, which consumes multi-colored pellets, both from other players and ones that naturally spawn on the map in the game, to grow in size. The objective of the game is to grow the longest snake in the server. Slither.io is similar in concept to the popular 2015 web game Agar.io and is reminiscent of the classic arcade game Snake.

The game grew in popularity following its promotion among several prominent YouTubers such as PewDiePie, and topped the App Store soon after its release. Slither.ios browser version was ranked by Alexa as one of the 1,000 most visited sites in July 2016, while the iOS version ranked first in the most downloaded apps on the App Store. A mobile version of the game for Android was released on March 27, 2016. The reception of the game was positive, with reviewers praising its appearance and customization but criticizing it for its low replay value and the high price users were required to pay to remove advertisements (although as of 2026, most versions of the game no longer show them).