A gunpowder-filled barrel is an item used in A Clockwork Syringe. It can be made by using gunpowder on a barrel in the factory on Bloodsplatter Isle. Once filled, players must take three of them to the southeastern room of the factory and use it on the unfinished barrelchest bodies. Once all three bodies have barrels, the player will ignite one, causing all three to blow up, killing the nearby Attendead. After the Attendead is dead, players can take the notes on the noticeboard and add them to their evidence file.