The Apatosaurus is the largest animal in Beasts of Bermuda. It is a herbivore, surviving solely off the consumption of plants to satiate its hunger. It has the biggest belly of any animal in the game, being able to survive well over an hour without eating if it needs to. This big belly, however, is also difficult to fill and requires consumption of significant amounts of foliage. The Apatosaurus is the most difficult creature to become overweight. It can also survive significant amounts of time without water, but when it does drink, it will very rapidly deplete any lake it is drinking from, thus the Apatosaurus can be a very effective animal for deliberately beaching any aquatic creatures taking an ambush position in a lake. It's size stat is also tremendously large, and it has the highest HP, but it is also the slowest animal in the game. It is the only animal in the game to possess the ability to destroy and consume class 5 foliage such as large trees.
The Apatosaurus' primary attack is a stomp. It rears up onto its hind legs momentarily and then stomps with its front limbs. If anything is nearby, it will take a very heavy amount of damage. The only creature capable of surviving this stomp is another Apatosaurus. This attack, however, also can make you vulnerable as movement is not allowed during the stomp attack.
The Apatosaurus also has a much more potent secondary attack, which is its tail whip attack. This attack should be the primary means of defense for the Apatosaurus. The execution of this attack is a bit different than others, as the attack is actually initiated when the Secondary Attack Keybind (Default is Right Mouse button) is released, rather than when it is pressed. While the button is held, the Apatosaurus' tail will aim in the direction of the player's camera. When released, the tail will crack like a whip, dealing lots of damage and applying knockback. Implementation of this mechanic was not an easy task, and a development blog on the topic was written here.
Unique Abilities: The Apatosaurus possesses the highest weather resistance of any terrestrial creature. It is also capable of granting some of its weather resistance to nearby herd members, an ability unique to it. The Apatosaurus is also capable of walking backward, an ability granted solely to it such that it can utilize knockback on its hind legs to avoid a blind spot where the tail cannot reach. In order to walk backwards, a player must press and hold the crouch keybind. This will knock back anything against the hind legs of the Apatosaurus, often into the range of its deadly tail.
Other facts: Being a very large creature, the Apatosaurus has little to fear at adult size. Most predators cannot take it on alone, and it is impervious to all but the strongest storms. Indeed, a healthy adult Apatosaurus is a force to be reckoned with and has few predators.
The Apatosaurus is able to defend itself on all sides. It has a powerful stomp attack as well as a tail whip, both of which can prove deadly to even the largest of foes.
The Apatosaurus possesses profound knockback. If anything gets near its feet, they will be kicked quite far. The smaller the victim of its kick, the further it will be punted. The Velociraptor can be punted extremely far, often threatening it with significant fall damage.