Cocky.io, a multiplayer io gaming game, is where you can show off your fighting skills while dominating your opponents in the arena. An enormous weapon that looks like a long, sausage .... is your weapon of choice as you move around the arena.Cocky.io, a multiplayer io gaming game, is where you can show off your fighting skills while dominating your opponents in the arena. An enormous weapon that looks like a long, sausage .... is your weapon of choice as you move around the arena.