Cannongun is a weapon available in Painkiller: Overdose. By the usage, this weapon resembles Rocket Launcher/Chaingun from original version. However, instead of shooting one rocket it shoots three smaller explosives. The chaingun which is mounted in the cannon deals greater damage. It can be found in Desert.
- 1 CANNON mode - average reload speed and range, but it makes up for it by it's power of destruction. It can kill a lot of enemies.
- 2 CHAINGUN mode - very fast and destructive. It has great range, accuracy and has greater power of destruction than Minigun.