Gelz.io
Eat cells. Grow big. Don't get eaten.
Play nowFree, in your browser. No download, no account needed.
What it is
You start as a single cell on a large map. Eating pellets makes you bigger; eating another player makes you a lot bigger. Being bigger also makes you slower, which is the whole tension of the game — the biggest cell on the map is also the easiest one to run circles around, and a swarm of small pieces can take down someone twice their size.
Splitting is how you attack. Your cell divides and launches half of itself toward your cursor, which is the only way to reach someone faster than you can walk. It is also how you get killed: the pieces merge back only after a delay, and until then each one can be swallowed on its own.
Four ways to play
Short version below; the game modes page has the actual numbers behind each one.
FFA 32x
The straight version. One cell, up to 32 pieces, 200 players to a world. Learn the game here — everything else is a variation on it.
Megasplit 128x
Two cells at once, up to 128 pieces each, on a map built for it. One key switches which half your mouse drives; the other keeps the heading you left it on. Two swarms closing from opposite sides is something no single-cell mode can do.
Bots 32x
You command a swarm of your own. The bots follow your cursor, split when you tell them to, and feed you their mass on command — and they can eat each other, and you, if you are careless.
Scrimmage
Your own lobby: pick the map size, the number of viruses, how many slots, and set a password. Turn on clan war and the room splits into two teams that spawn on opposite sides. First side to hold 90% of the mass wins.
The controls, in short
Freeze is the one worth learning. Hold your swarm still with S and split, and the pieces line up in a straight row instead of scattering — a line split, and the reason a smaller player can cover ground a bigger one cannot. The full guide walks through it, along with virus tricks, merge timing and the mass decay that stops anyone growing for ever.
Skins, names and levels
Signing in with Discord is optional, and only worth it if you want to keep something. Levels and XP carry across rounds, coins buy a reserved name that nobody else can play under — drawn in a colour you pick, in game and in chat — and skins are drawn by players and reviewed before they go in. Everything else works without an account.
The skin gallery is the whole set on one page. None of them are locked, and none of them change how you play.
Where the players are
Servers run in Europe. The community lives on Discord: that is where scrimmages get arranged, clans find opponents, skins get submitted, and bugs get reported to somebody who can actually fix them.