While all kinds of Io Games have been added on our website up until this point, multiplayer games online like the one you are about to give a try to right now are not that often found, the game being called Killer.io, being the first game in this category that gives you the chance of becoming a serial killer, which is certainly going to be a fresh experience for everyone trying it, even more so because you are competing against people from all over the world to see which of you gets more kills in for every match. You and other players will be placed in different public places with big crowds, and you try to kill as many people as possible without getting caught. The more, the better, because it improves your score, and the player with the biggest score becomes the winner, simple as that. Avoid killing when there are people around, and make sure to move away from the body as soon as you've done a kill. Before the two and half minutes run out, get in as many kills as possible. You move your avatar using the arrow keys, you press the Z key to attack and the X key to interact with things. Make sure to grab knives, machetes, guns, bats, and other weapons you find, and then use them for your attacks. It is as simple as that! With the coins that you earn from won battles, you can buy new skills for your player, as you can become different famous murderers from shows and movies. Good luck to all those playing, and stick around if you want to have fun here all day long, with one free game after the other!