A flare gun is a gun that shoots flares. It is generally used for signaling, such as distress signals, ranging from at sea or from the ground to airborne aircraft. It is not designed to function as a weapon.
After Talbot knocked Sully into the water, Nathan jumped in to save him. Taking the flare gun from Sully, Nathan used it to destroy the winch that was lifting the brass vessel out of the water, as well as a pillar supporting the city above, which resulted in the complete destruction of Atlantis of the Sands' infrastructure and in turn the entire city.
- Katherine Marlowe's agents
- Victor Sullivan
- Nathan Drake
- It is actually a Heckler & Koch P11 underwater pistol, which fires special darts that have a higher chance of killing when shot underwater. The real life weapon most certainly does not fire any kind of explosive round or rocket, as the gun in Uncharted 3: Drake's Deception does.