How to play: Use arrow keys or WASD for the movement. Press Z to kill, use X to interact.
In Killer.io unblocked, you will take on the role of a silent killer who has to slay as many people as possible. They are attending a Halloween party with good spirits but they have no idea that there is a killer targeting all of their lives. You will make your way through this party and the big challenge for you is that you have to avoid getting caught by the people there. As you move, try to kill them without them knowing and make sure they will not see you killing them, otherwise, your mission will be failed, causing the game to be over. You can prepare some strategies in advance to cope with tough situations. Everything must be done in a careful way if you want to survive until the end to win. You can play Killer.io free online in your browser to express your skills! Have fun with it!