What is Killer.io?
Killer.io is a free .io game with halloween, killer and multiplayer elements that you can play online in your web browser on Gameziko. It needs no download, no install and no account. Kill and hide bodies in this fun online murder game.
How to play Killer.io
- Press "Play now" on the game screen. Killer.io loads inside the player; some games take up to 20 seconds and may show a short ad first.
- Arrow keys or Tap controls to move
- Use the full-screen button at the bottom right of the player for a bigger view, and press Esc to leave full screen.
Game details
| Category | .io |
|---|---|
| Tags | halloween, killer, multiplayer |
| Controls | Touch (tap or swipe), Arrow keys |
| Screen | Landscape (800 × 600) |
| Price | Free |
| Download or sign-up | Not needed |
| Distributed by | GameDistribution |
| Added to Gameziko | 30 September 2026 |
Description from the developer
Kill and hide bodies in this fun online murder game. Try to kill as many people at the Halloween party as possible. Try not to get caught!
Killer.io: frequently asked questions
Is Killer.io free to play?
Yes. Killer.io is free to play on Gameziko, with no download and no account needed. Like most free web games, it is funded by ads, so it may show a short ad before or between rounds.
What are the controls in Killer.io?
The developer's instructions for Killer.io say: "Arrow keys or Tap controls to move"
Can I play Killer.io on a phone or tablet?
Yes. Killer.io supports touch controls, so it works in the browser on Android phones, iPhones and tablets as well as on a computer.
What games are similar to Killer.io?
If you like Killer.io, try Impostor Royal Solo Kill, Impostor Rescue and Zombeat.io. They are .io games with similar themes, and you can find more in the .io category on Gameziko.
Good to know
Killer.io is made by an independent developer and delivered by GameDistribution, so Gameziko cannot change the game or recover lost progress. Any progress the game saves is kept in your browser on this device. If the game does not start, wait up to 20 seconds, allow ads for gameziko.com and try again, or report the game.