The Chaingun is a weapon mounted to the Patriarch's left arm.
Despite bieng very overpowered against the Specimens, it is not usable by the players.
The Chaingun's bullets are easy to avoid, by taking cover when doing the chaingun line. The rockets, however, are a bit more tricky to avoid. By jumping, the player can easily dodge his rocket. However, if the player jumps into the rocket, it might be a fatal result.