Enemies who posses full body armour, such as Hunters and Juggernauts, are completely immune to it. The TOZT-7 cannot be fired underwater or in a vacuum. Only in the first Marathon, the TOZT-7 could be used to "fly" on low-gravity levels by aiming at the floor and discharging the weapon. In Marathon, the flamethrower is first found on the level Smells Like Napalm, Tastes Like Chicken.