Killer.io

Killer.io is a darkly fun online murder game set at a Halloween party. Sneak around, eliminate guests, and hide bodies without getting caught.

Use arrow keys on desktop or tap controls on mobile to navigate the party map. Stay out of sight while you hunt targets and dispose of evidence.

Kill as many people at the Halloween party as possible while avoiding detection. The higher your body count without being spotted, the better your run.

Leaving victims in plain view alerts other guests and ends your spree quickly. Plan kills near hiding spots so you can stay unnoticed longer.

Yes. Killer.io plays directly in the browser with no install needed. It is a quick stealth-killer io game themed around Halloween party chaos.