slither.io

What it is

slither.io is a free online action game from Lowtech Studios. You control a snake in a shared arena with other people, and the aim is to become the longest one. It was released on Mar 25, 2016. The content rating is Everyone. The most recent update shown on the page is dated 2025-11-09.

What it does well

Install numbers are the headline: 500,000,000+. The Play rating is 3.9 from 6,540,779 ratings. Five stars make up 59.8% and four stars add 11.2%, so about 71% of raters gave four or five.

The rules are short enough to fit in a sentence. If your head hits another player, you are out and your snake breaks apart. If another player hits you, they are out and you can collect what is left. The listing also says that size is not everything: a small snake can cut across the path of a far bigger one and knock it out. That gives newcomers a fair shot, at least on paper.

That is a simple pitch, and it is probably why the game scales so widely. There is no long tutorial mentioned and no complicated menu system described.

Where it falls short

The ratings are the clearest weak spot. One-star ratings make up 18.2% of the total, with 4% at two stars and 6.8% at three. In all, about 29% of raters are at three stars or lower. That is a large share. The listing does not offer a reason, so I will not guess at one.

The page also gives very little detail. It does not mention ads, purchases, skins or game modes. It does not say whether you can play offline, and since the game is described as online play against other people, you should assume you need a connection.

Who it suits

People who want a quick, low-commitment online game with a clear goal and who do not mind a mixed rating. If you prefer calm, offline or story-driven play, this is not the match.