The KO Cannon is a rare weapon that only drops during a Blood Moon when Hard Mode has been activated. It does not consume ammo. It functions similarly to the Harpoon, and can drop from almost any monster. It provides continuous fire, allowing the player to backpedal while firing, making it useful for dealing with hordes of enemies and kiting larger ones.
KO-Canon through wall


  • At point-blank range this weapon can do massive damage since it possesses auto-fire.


  • If it's aimed at a door the glove will disappear.
  • The glove can sometimes pass through walls when walking towards or away from the wall.

Update Info


  • Added to the game.

    KO Cannon being used.

KO Cannon - Terraria 100:42

KO Cannon - Terraria 1.2 Guide New Melee Weapon!