CoilWars: a free worm io game with coils and traps
CoilWars is a free worm io game you play right here in your browser. Eat glowing crystals to grow your worm, then turn your length against everyone else in the arena: loop around a rival to swallow them, drop the back of your body as a live-wire trap, and race to energy surges before anyone else. There is nothing to download and no sign-up, and it runs on phones, tablets and computers.
How to play
- Steer with your mouse, your finger or the A and D keys, and eat crystals to grow.
- Boost with left click, Space or the Boost button. Boosting burns length, so save it for a cut-off or an escape.
- Coil: cross your own body to close a loop. Everything inside is swallowed at 1.5×, and smaller worms caught inside are crushed.
- Shed with right click, Q or E once you reach length 50. The back of your body becomes a live-wire trap for 7 seconds, and anyone who crashes into it counts as your kill.
- Power-ups: Magnet pulls crystals in, Turbo boosts for free, ×2 doubles your growth, Shield survives one crash and Ghost lets you glide through other worms.
- In a head-on crash, the bigger worm wins.
Six ways to play
- Classic: an endless free-for-all. Grow as big as you can and climb the leaderboard.
- Battle Royale: 16 worms start at the same size while a storm shrinks the arena in four phases. The last worm alive wins.
- Teams: Aqua against Magma. Teammates pass through each other, so you can trap enemies together.
- King of the Hill: keep your head inside the golden hill to score. Holding it alone scores double, and the hill moves every 32 seconds.
- Infection: a few worms carry a virus that spreads on touch. Infected worms are faster, and the survivors win if anyone is still clean at the buzzer.
- Blitz: three minutes, everyone starts at length 60 and food is everywhere. The biggest worm at the buzzer wins.
Play worm io with friends
Press Create game, pick the mode, the bots, the arena size and the round length, then share the 5-character code or the invite link. Your friends press Join game or open the link and land in your private room. Want to warm up first? Practice starts a round against easy bots.
Tips for a bigger worm
- Stay close to fights: a worm that crashes leaves its whole body behind as food.
- Coil around clusters of crystals. A closed loop eats everything inside at 1.5×.
- Shed a trap right in front of a worm that is chasing you.
- In Classic, Teams and Blitz, follow the yellow arrow to energy surges.
- In Battle Royale the next safe circle appears before the storm moves, so get inside early.
Skins, hats and trophies
Every game earns XP. Levels unlock 34 skins and 15 hats, 22 trophies pay extra XP, and three new daily missions arrive every day. Guests keep their progress in the browser. Sign in with Google to save it on every device and appear on the leaderboards.
Questions
Is CoilWars free?
Yes. CoilWars is completely free, with no ads and nothing to buy.
Do I need to download anything?
No. CoilWars runs in any modern browser on computers, phones and tablets. If you like, you can also install it as an app from your browser's menu.
Can I play on my phone?
Yes. Steer with your finger and use the on-screen Boost and Shed buttons.
Do I need an account?
No. Guests play instantly and keep their progress in the browser. Signing in with Google is optional: it saves your progress on every device, reserves your name and puts you on the leaderboards.
Can I play worm io with friends?
Yes. Press Create game, choose the rules and share the 5-character code or the invite link. Your friends press Join game or open the link.
How is CoilWars different from other worm io games?
Besides eating and dodging, you can close a coil around other worms to swallow them, drop live-wire traps behind you, and play round-based modes such as Battle Royale, King of the Hill and Infection.
Is the chat safe?
Quick chat only sends eight preset phrases, so nobody can type messages to other players, and player names are filtered.