The Gasbag is an alien species, either a native creature from the planet Na Pali or possibly artificially created through bio-engineering by the Skaarj race. It floats around and moves through air and shoots slow-moving, but powerful, flaming projectiles. When the Gasbag is at close range, its projectiles are harder to dodge and it can use its fists, though its punches inflict little damage. The Gasbag therefore tries to approach its target while firing its projectiles and evading shots from the target. The Gasbag dodges projectiles well, so hitscan weapons like the Shock Rifle and the Lightning Gun are generally more effective against it.