Stabby.io is a cool multiplayer IO game about weird looking old guys stabbing each other and you can play it online and for free on Silvergames.com. On a map full of characters that look just the same, your objective is to determine which ones are bots and which ones are actually players.
Watch closely at their moves and you will find some hints that tell you when there’s a human behind one of those creepy men. When you find them, get close enough and stab them to earn points. If someone sees you stab or act like a player, you will be the next one to fall. Have fun with Stabby IO!