The Brachiosaurus is the largest and heaviest known animal to ever walk FMM UV-32. This animal is so large that it is nearly unharmed when shot by the hunter. This massive animal is different from other large plant-eating Sauropods, as it possess longer forelegs than hind legs and spends a majority of its time in water, browsing on aquatic plants.
The Brachiosaurus cannot be killed, though trying without modding or using debug mode will only result in wasted ammunition, as its health is set in _RES.TXT to 1024. Even after it is after killed, the animal will continue moving due to the lack of a not dead animation in its BIKE file. Other effects of its death include:
Many cheat sites claim that Brachiosaurus can be unlocked in Carnivores, often along with Seismosaurus, and that the only way to kill it is by shooting it in the rear with an X-Bow. While this isn't true, an early sales brochure for Carnivores listed Brachiosaurus as a secret unlockable animal, along with a rocket launcher and a "training level".
Brachiosaurus may have been originally planned as a pointable animal; if so, it may have been changed to an ambient animal because it would have been too hard for the the hunter to kill. On the other hand, the fact that it is incredibly slow and harmless may have made Brachiosaurus too easy to hunt, and not challenging enough to give the hunter points.
The volcano in "Mount Ravan" doesn't have liquid lava, unlike volcanic areas in Carnivores. This is because of a bug where Brachiosaurus can spawn in liquid lava because the AtmosFear engine has no exception for this situation to prevent it. This can be seen in some fan-made maps made with alt editor II that feature liquid lava and ports of the Carnivores maps to the Carnivores 2 engine.
↑Unlike other ambient animals, which simply omit the property, Brachiosaurus'basescore property is specified as 0 in _RES.TXT, pointing to the fact that it was originally planned as a pointable animal.