This weapon launches balls of fire that ignite foes from a distance. It is different from the heavy incinerator as it has a slower rate of fire, shorter range, and a less potent projectile. It does, however, possess a smaller spread.
The incinerator can fire a total of about 995 times using standard fuel, the equivalent of 34 reloads, from full condition before breaking. The flamer and heavy incinerator also fire exactly the same amount before breaking.
The incinerator can be fired faster semi-automatically than it can automatically.
Due to the fact that the balls of flame do not explode until it comes into contact with a surface, one can aim the weapon directly up and fire. The flames will go straight up, but then fall down a few meters in front of the player character after a few seconds. This can be used to fire over buildings and other obstacles.
If dropped underwater, the torch at the end of the muzzle will continue to burn.
There is sometimes a minor animation glitch that occurs when one is killed by a hit from the lower torso with the weapon equipped. The player character's now-dead hand, still grasping the weapon, will move toward their neck. This may cause the incinerator to become stuck in their neck, and the neck will stretch out several feet, sometimes even wrapping around the weapon. This glitch has been confirmed to work on the Xbox 360 and PC version of the game and is best performed with spore carriers as the killers.