Glimworm
Free online glow-worm arena — slither, survive, eat the lights
Glimworm is a fast real-time multiplayer arena in the slither.io family, redesigned around glowing creatures, dark arenas, and bite-sized rounds. Eat lights to grow, dodge other players’ trails, and outlast everyone else. On Arcadeum you can play Glimworm right in your browser — free, with up to ten players, AI bots, or both.
- Browser-based
- AI bots available
- Battle Royale & Time Attack
- ~5 min per round
How to play Glimworm
1. Create a room and pick a mode
Choose Battle Royale, Time Attack, or Lives + Heats. Invite friends with a shareable link, or fill empty seats with AI bots and start solo.
2. Slither into the arena
Your glowing worm spawns at a random spot. Move with the mouse or touch and start eating lights — every light makes your worm a little longer and a little brighter.
3. Avoid other worms’ trails
Colliding head-first with another worm’s trail ends your run. Cut across smaller worms when you can, but never charge a longer trail head-on.
4. Outlast everyone
In Battle Royale, the last worm alive wins. In Time Attack, the highest-scoring worm at the buzzer wins. Either way, staying alive while growing is the whole job.
About Glimworm
Glimworm draws on the lineage of arcade snake — Nokia’s tiny mobile classic, the late-2010s slither.io browser craze, and the agar.io school of physics-friendly arenas. The core loop is unchanged: collect food to grow, avoid colliding with another worm’s trail, and stay alive longer than everyone else. Glimworm’s twist is the dark, neon arena where every worm radiates its own light and trails leave a fading glow.
The game ships with three modes. Battle Royale shrinks the arena as the round progresses, forcing confrontations until one worm remains. Time Attack puts everyone on a 90-second high-score clock with no permanent elimination — perfect for casual sessions. Lives + Heats hands each player three lives and runs multiple heats before crowning a champion.
On Arcadeum, Glimworm runs entirely in your browser — no download, no install, no signup wall. You can create a private room and share a link, drop into a public quick-play match, or fill empty seats with AI bots to start a session even when nobody else is around. Rounds typically last about five minutes, which makes Glimworm a great between-meetings game.
Frequently asked questions
Is Glimworm free to play?
Yes. Glimworm on Arcadeum is completely free to play in your browser. There is no download required and no payment to start a match.
How many players can play Glimworm?
Glimworm supports up to ten players in a single arena. You can fill empty seats with AI bots if you want to start without waiting for humans.
Can I play Glimworm against AI?
Yes. Every empty slot can be filled with an AI bot, so you can practice solo, warm up your reflexes, or round out a smaller group.
How long does a Glimworm round take?
A typical Glimworm round lasts about five minutes — short enough for a coffee break, long enough that early mistakes still matter.
What are the basic rules of Glimworm?
Move your glowing worm around the arena, eat lights to grow longer, and avoid colliding with another worm’s trail. The last worm alive (or the highest-scoring worm at the end of the timer, depending on the mode) wins the round.
Ready to slither?
Spin up a room and share the link — the arena is glowing.
Create a Glimworm room