Game modes

Every number on this page is read straight out of the server's own configuration when the page is served, so it cannot drift away from what the game actually does.

Gelz.io runs four worlds in Europe. They share one engine and one set of controls — what changes is how big you start, how far a split goes, how many cells you are allowed to break into, and whether anything else is on the map with you. If you have never played, start with FFA 32x; the others make more sense once the basic loop of eat, split, run is automatic.

FFA 32x

The plain version, and the one to learn on. One cell, five splits deep, and the biggest player count of any world — the map is busy enough that standing still is never the safe option.

Megasplit 128x

You spawn as a heavyweight and one press of Space turns you into a swarm. Seven doublings instead of five, and cells here grow more than four times as heavy before the game breaks them up for you. The only world where you drive two cells at once.

Bots 32x

Megasplit’s rules at a smaller cap, plus a swarm of your own that follows your cursor. Everything moves about 15% slower here, so there is time to actually command the pack — and the bots are ordinary cells, which means they are food for anyone quick enough to catch them, you included.

Instant 64x

The one world with no merge cooldown. Everywhere else a split piece waits half a minute or more before it can rejoin you; here it comes back the moment it touches, so splitting is a move you can take back. Bots 32x’s rules otherwise, with the swarm taken away and the cap doubled — six doublings deep instead of five, and nothing on the map working for you.

Scrimmage

Not a world of its own but a lobby you build: pick the map, the number of viruses and how many people fit, put a password on it if the match is private, and the room runs Megasplit’s rules inside your settings. This is where clan matches and 1v1s happen.

The maps are Tiny (8,000×8,000), Small (12,000×12,000), Medium (16,000×16,000), Large (20,000×20,000), Huge (28,000×28,000). Turn on clan war and the lobby splits into two teams that spawn on opposite corners; teammates can still eat each other, so a careless split feeds your own side’s opponent. The match ends the moment one team holds 90% of the mass in the room.

Rules every mode shares

You have to be 1.25 times heavier to swallow another cell, which is why two cells of similar size can sit on top of each other all day. A split piece waits 30 seconds plus 0.02 seconds per unit of mass before it can rejoin, so the bigger the piece the longer you are exposed — everywhere except Instant 64x, which is the one world that waives it. And above 200 mass you lose 0.6% of your mass every second — nobody sits at the top of the leaderboard by parking in a corner.

The full guide covers the parts that take practice rather than reading: line splits, popping someone on a virus, and when it is worth splitting into a fight you might lose.