Slither.io

<h2 id="gameplay">Gameplay</h2>

The objective of the game is to control a snake, also known as "slithers", around a wide area and eat pellets, defeating and consuming other players to gain mass to grow the largest and longest in the game.<a class="footnote-ref" id="fnref:2" href="#fn:2">2</a> Once players are spawned into the virtual world, their avatar remains in constant motion. If the player's snake's head collides with another slither's body, the player will die. The defeated avatar's body turns into bright, larger shining pellets for other players to consume.<a class="footnote-ref" id="fnref:3" href="#fn:3">3</a><a class="footnote-ref" id="fnref:4" href="#fn:4">4</a> These pellets that remain from "death" of an avatar will correspond to the color of the avatar itself, and are both brighter and bigger than "normal" pellets, which spawn naturally throughout the world.<a class="footnote-ref" id="fnref:5" href="#fn:5">5</a> Normal pellets do not give as much mass as pellets dropped from other snakes. "Chase" pellets will appear individually in various places of the world; when eaten, they give a greater amount of mass than pellets dropped by other snakes. Chase pellets avoid snakes and flee when they draw near. Chase pellets can be obtained by boosting.<a class="footnote-ref" id="fnref:6" href="#fn:6">6</a>
By pressing and holding the space bar, up arrow, or left/right mouse button, or double-tapping the touch screen on mobile, the player can use their boost, which causes the avatar to speed up using mass.<a class="footnote-ref" id="fnref:7" href="#fn:7">7</a> When the button is released, or the finger on the touchscreen on mobile, the snake will stop using its boost. As a player uses their boost, the snake loses mass, causing the snake's size to shrink slightly as the player continues to boost. The mass that is lost from the boost appears as a line of small pellets where the boost was used.<a class="footnote-ref" id="fnref:8" href="#fn:8">8</a> The mass lost can be regained by consuming the pellets. Similar to pellets dropped from defeated avatars, the boost pellets correspond to the color of the avatar. The boost feature is useful to outmaneuver and defeat opponents.<a class="footnote-ref" id="fnref:9" href="#fn:9">9</a> A common strategy that is used by players to defeat opponents is by coiling the player's slither around a smaller opponent's in a loop, until the opponent, trapped in the tightening loop, crashes into the player.<a class="footnote-ref" id="fnref:10" href="#fn:10">10</a>
There is a border that confines avatars within the circular game board. If a snake hits the border, the player automatically dies without turning into pellets. On each server, leaderboards are displayed at the top right, showing the top ten players with snakes that have the most mass out of all the other slithers in the entire server.<a class="footnote-ref" id="fnref:11" href="#fn:11">11</a>

<h3>Skins</h3>
There are 16 default skins, each one a different solid color along with multiple repeating patterns.<a class="footnote-ref" id="fnref:12" href="#fn:12">12</a> The colors are randomly chosen when the player joins the server.<a class="footnote-ref" id="fnref:13" href="#fn:13">13</a> Players can choose to customize their snake's appearances using custom skins with unique designs including different countries' flags, as well as skins with motifs and colors representing well-known <a href="/facts/YouTuber/PMdeqgVl">YouTubers</a>, such as <a href="/facts/Jacksepticeye/145m25Le">Jacksepticeye</a>, Jelly, and <a href="/facts/PewDiePie/EjMDr04r">PewDiePie</a>.<a class="footnote-ref" id="fnref:14" href="#fn:14">14</a> The player may also choose to create their own skin, with a tool known as "Build a Slither", which shows the different colors that an avatar can be made of, that can be placed on the worm upon clicking. Previously, in order to unlock custom skins in browser mode, players were forced to share the game on <a href="/facts/Twitter/VWwDNGUm">Twitter</a> or <a href="/facts/Facebook/0IhXFR6u">Facebook</a> using the external links found on the website. By June 2016, the ability to add skins was also added to the iOS and Android versions.<a class="footnote-ref" id="fnref:15" href="#fn:15">15</a>

<h2 id="development">Development</h2>
According to game creator Steven Howse, he was inspired to create the game while he was experiencing financial problems. As a result of these financial issues, he had to move from <a href="/facts/Minneapolis/gEsXsP3d">Minneapolis</a> to <a href="/facts/Michigan/bCurmfT2">Michigan</a>, where he realized the popularity of '<a href="/facts/Agar.io/eslhSI1U">Agar.io</a>'.<a class="footnote-ref" id="fnref:16" href="#fn:16">16</a> He had long wanted to create an <a href="/facts/Multiplayer_online_game/8CC60Nwj">online multiplayer game</a>, but Adobe Flash was the only development option at the time, but not wanting to use this method, he paused the idea for a while. Howse finally created the game when he realized that <a href="/facts/WebSocket/NcQrqpnv">WebSocket</a>, a low-latency protocol supported by most major browsers, was sufficient and stable enough to run an HTML game similar to other games such as Agar.io.<a class="footnote-ref" id="fnref:17" href="#fn:17">17</a> The most difficult part of the development was in making each server stable enough to handle 600 players at a time. Howse struggled to find space on servers with enough space in regions where there was more demand and tried to avoid cloud services like <a href="/facts/Amazon_Web_Services/UFVN2796">Amazon Web Services</a>, owing to the high cost that these services would incur based on the amount of <a href="/facts/Bandwidth_(computing)/lY6Tb4gX">bandwidth</a> used.<a class="footnote-ref" id="fnref:18" href="#fn:18">18</a><a class="footnote-ref" id="fnref:19" href="#fn:19">19</a>
After six months of development, Slither.io was released for <a href="/facts/Browser_game/cBtuK3dt">browsers</a> and <a href="/facts/IOS/mK5cggH5">iOS</a> on March 25, 2016, with servers supporting up to 500 players.<a class="footnote-ref" id="fnref:20" href="#fn:20">20</a><a class="footnote-ref" id="fnref:21" href="#fn:21">21</a> Two days after the iOS/browser versions' release, an <a href="/facts/Android_(operating_system)/nNyHb0xz">Android</a> version was made available by Lowtech Studios.<a class="footnote-ref" id="fnref:22" href="#fn:22">22</a> The only way Howse could make revenue was to display <a href="/facts/Online_advertising/Ncsv0GRz">advertising</a> in the app after the player's worm died; this option could be removed for <a href="/facts/United_States_dollar/naEEDUhC">US$</a>3.99. He chose not to sell virtual currency or <a href="/facts/Power-up/tkaC9PHa">power-ups</a> so that those who paid would not have an advantage over players who did not.<a class="footnote-ref" id="fnref:23" href="#fn:23">23</a> As there was no money to advertise for the game, the only way to promote the game was the various <a href="/facts/Let%2527s_Play/1oDJf9mc">let's plays</a> by players on <a href="/facts/YouTube/db276jst">YouTube</a>, including PewDiePie, who had more than 47 million subscribers at the time.<a class="footnote-ref" id="fnref:24" href="#fn:24">24</a><a class="footnote-ref" id="fnref:25" href="#fn:25">25</a> The success of the game would cause <a href="/facts/Raw_Thrills/fGcoMG6M">Raw Thrills</a> to develop an arcade version a few years later.<a class="footnote-ref" id="fnref:26" href="#fn:26">26</a><a class="footnote-ref" id="fnref:27" href="#fn:27">27</a>
In the weeks following the release, Howse worked on updates to stabilize the game and provide a better experience for players.<a class="footnote-ref" id="fnref:28" href="#fn:28">28</a><a class="footnote-ref" id="fnref:29" href="#fn:29">29</a> In addition, he plans to add new features, such as a "friendly mode" that allows people to set up teams, and a way for the player to choose a server to play on.<a class="footnote-ref" id="fnref:30" href="#fn:30">30</a> Howse said that two major gaming companies had approached him to buy Slither.io. He had considered the idea, since he felt that it was stressful to maintain the game.<a class="footnote-ref" id="fnref:31" href="#fn:31">31</a>

<h2 id="reception">Reception</h2>
Soon after release, Slither.io reached the top of the App Store sales charts in the free software category in several regions,<a class="footnote-ref" id="fnref:32" href="#fn:32">32</a> including the United States<a class="footnote-ref" id="fnref:33" href="#fn:33">33</a> and the United Kingdom.<a class="footnote-ref" id="fnref:34" href="#fn:34">34</a> By the end of 2016, Slither.io had become <a href="/facts/Google/GT9Sugza">Google</a>'s most searched video game of the year in the United States.<a class="footnote-ref" id="fnref:35" href="#fn:35">35</a>
Patricia Hernandez of <a href="/facts/Kotaku/42xYCxRl">Kotaku</a> said that the game's low barriers to entry and similarity to Agar. io explained Slither. io's popularity. She noted the game's fast pace.<a class="footnote-ref" id="fnref:36" href="#fn:36">36</a> Boing Boing compared the game's core mechanic to that of the 2009 game <a href="/facts/Osmos/SrJnwdPh">Osmos</a>.<a class="footnote-ref" id="fnref:37" href="#fn:37">37</a> Brandt Ran, writing for <a href="/facts/Business_Insider/vxTTFRY4">Business Insider</a>, said that "despite running into some technical hiccups—the game can lag heavily at times—I doubt Slither.io will be leaving my <a href="/facts/Home_screen/q5Aaaho2">home screen</a> anytime soon."<a class="footnote-ref" id="fnref:38" href="#fn:38">38</a> Harry Slater, writing for <a href="/facts/Pocket_Gamer/oYdELIP6">Pocket Gamer</a>, defined the game as "interesting", the gameplay as a "compulsive experience", and the structure as simple and similar to Agar.io, although it did not have a large <a href="/facts/Replay_value/83HBvWNF">replay value</a>.<a class="footnote-ref" id="fnref:39" href="#fn:39">39</a> <a href="/facts/TechCrunch/9gs5SykU">TechCrunch</a>'s Felicia Williams praised the designs, getting "pleasantly surprised" with the variety of skins for customization.<a class="footnote-ref" id="fnref:40" href="#fn:40">40</a> Lian Amaris of <a href="/facts/Gamezebo/QexCgVKr">Gamezebo</a> found the game to be "far more interesting than Agar.io" because it involved "an ever-growing languid body rather than just a flat circle", and praised "the dark environment with neon worms," which gave the game a "retro arcade feel." Amaris also compared the concept of Slither.io to that of <a href="/facts/Agar.io/eslhSI1U">Agar.io</a> and stated that Slither.io was reminiscent of the classic arcade game <a href="/facts/Snake_(video_game_genre)/HrVSdS1p">Snake</a>.<a class="footnote-ref" id="fnref:41" href="#fn:41">41</a>
Shortly after the release of the mobile versions, the game was in first place in the ranking of games of the App Store.<a class="footnote-ref" id="fnref:42" href="#fn:42">42</a><a class="footnote-ref" id="fnref:43" href="#fn:43">43</a> Despite Slither.io's popularity, it received mixed reviews. Scottie Rowland of Android Guys praised the gameplay and graphics but criticized the ads that pop up on the screen after the end of the game, calling them "extremely annoying", and finding the payment to remove them "a bit pricey".<a class="footnote-ref" id="fnref:44" href="#fn:44">44</a>

<h3>Popularity</h3>
By July 2016, the browser version website was ranked by <a href="/facts/Alexa_Internet/GM1LI4IU">Alexa</a> as the 250th most visited site worldwide, but then experienced a decline in popularity, dropping below 1,000 by October 2016 before remaining mostly constant at approximately 1,700 by January 2017. In April 2017, Slither.io's global rank then started declining further, reaching 2,800 by September 2017.<a class="footnote-ref" id="fnref:45" href="#fn:45">45</a> By that same period, the game had already been downloaded more than 68 million times in mobile applications and played more than 67 million times in browsers, generating a daily income of US$100,000 for Howse.<a class="footnote-ref" id="fnref:46" href="#fn:46">46</a><a class="footnote-ref" id="fnref:47" href="#fn:47">47</a>

<h2 id="see-also">See also</h2>
<ul><li><a href="/facts/Snake.io/hqdwrBMd">Snake.io</a></li>
<li><a href="/facts/Snaky_Cat/2ts8V1B7">Snaky Cat</a></li></ul>
<h2 id="notes">Notes</h2>

<h2 id="external-links">External links</h2>
<ul><li><a href="http://slither.com/io">Official website</a> </li></ul>

<h2 id="references">References</h2>

<ol>
<li id="fn:1">Sometimes called or pronounced "slitherio" (/ˈslɪðəriːoʊ/) and "slither" <a href="/wiki/Help:IPA/English" target="_blank">/wiki/Help:IPA/English</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></li>
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<li id="fn:3">Amaris, Lian (April 11, 2016). "Slither.io Proves Size Doesn't Always Matter". Gamezebo. Archived from the original on September 23, 2016. Retrieved March 14, 2017. <a href="http://www.gamezebo.com/2016/04/11/slither-io-proves-size-doesnt-always-matter/" target="_blank">http://www.gamezebo.com/2016/04/11/slither-io-proves-size-doesnt-always-matter/</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></li>
<li id="fn:4">Hernandez, Patricia (April 14, 2016). "Slitherio, YouTube's Hottest New Game, Is More Fun Than It Has Any Right To Be". Kotaku. Archived from the original on May 1, 2016. Retrieved April 29, 2016. <a href="https://kotaku.com/slitherio-youtubes-hottest-new-game-is-more-fun-than-1771013293" target="_blank">https://kotaku.com/slitherio-youtubes-hottest-new-game-is-more-fun-than-1771013293</a> <a href="#fnref:4" class="footnote-back-ref">↩</a></li>
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<li id="fn:10">"8 tips and cheats for App Store smash Slither.io". Pocket Gamer. May 3, 2016. Archived from the original on May 6, 2016. Retrieved May 6, 2016. <a href="http://www.pocketgamer.co.uk/r/iPhone/Slitherio/feature.asp?c=69926" target="_blank">http://www.pocketgamer.co.uk/r/iPhone/Slitherio/feature.asp?c=69926</a> <a href="#fnref:10" class="footnote-back-ref">↩</a></li>
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<li id="fn:12">The default colors are orange, yellow, purple, lavender, teal, green, chartreuse, brick, pink, red, and white.[6] <a href="/wiki/Orange_(color)" target="_blank">/wiki/Orange_(color)</a> <a href="#fnref:12" class="footnote-back-ref">↩</a></li>
<li id="fn:13">Brown, Mark (May 19, 2016). "What all the Slither.io skins mean on iOS and Android". Pocket Gamer. Archived from the original on March 15, 2017. Retrieved March 14, 2017. <a href="http://www.pocketgamer.co.uk/r/iPhone/Slitherio/feature.asp?c=70113" target="_blank">http://www.pocketgamer.co.uk/r/iPhone/Slitherio/feature.asp?c=70113</a> <a href="#fnref:13" class="footnote-back-ref">↩</a></li>
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<li id="fn:19">Brown, Mark (May 16, 2016). "Interview: The future of Slither.io, and tips direct from the developer". Pocket Gamer. Archived from the original on October 22, 2016. Retrieved March 14, 2017. <a href="http://www.pocketgamer.co.uk/r/iPhone/Slitherio/feature.asp?c=70063" target="_blank">http://www.pocketgamer.co.uk/r/iPhone/Slitherio/feature.asp?c=70063</a> <a href="#fnref:19" class="footnote-back-ref">↩</a></li>
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<li id="fn:24">Needleman, Sarah E. (June 17, 2016). "As 'Slither.io' Goes Viral, Game's Creator Scrambles to Keep Up". Wall Street Journal. ISSN 0099-9660. Archived from the original on December 14, 2021. Retrieved March 14, 2017. <a href="https://www.wsj.com/articles/as-slither-io-goes-viral-games-creator-scrambles-to-keep-up-1466195058" target="_blank">https://www.wsj.com/articles/as-slither-io-goes-viral-games-creator-scrambles-to-keep-up-1466195058</a> <a href="#fnref:24" class="footnote-back-ref">↩</a></li>
<li id="fn:25">Hernandez, Patricia (April 14, 2016). "Slitherio, YouTube's Hottest New Game, Is More Fun Than It Has Any Right To Be". Kotaku. Archived from the original on May 1, 2016. Retrieved April 29, 2016. <a href="https://kotaku.com/slitherio-youtubes-hottest-new-game-is-more-fun-than-1771013293" target="_blank">https://kotaku.com/slitherio-youtubes-hottest-new-game-is-more-fun-than-1771013293</a> <a href="#fnref:25" class="footnote-back-ref">↩</a></li>
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</ol>

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