The Gatling Gun is the 4th troop you unlock in Compass Point: West. His gatling gun fires a hail of bullets that do extra damage to enemies on foot. He is best used simularly to the Forty Niner. He has a high deployment cost, but due to his low health you will need to spend more points on other troops to absorb the damage, making the Gatling Gun expensive to use. Keep in mind that he moves slower than the Forty Niner and the Tin Man, be careful not to leave him behind unprotected.