Beast Forms

Beast Forms are a unique feature of the skill system in Project: Gorgon. Beast Forms are transformations which can be discovered from consuming potions, failing to defeat specific bosses, participating in events, or leveling skills. While technically curses, many consider Beast Forms to be viable, powerful alternatives to living life in a humanoid form.

Skill Characterization

Cow

Cows are viewed as a traditional tank archetype. Abilities such as Tough Hoof and Chew Cud help Cows improve their survivability in longer fights. Cows also have the sprint ability Moo of Determination, and the the ability to produce their own milk.
Bottle of Milk
is a valuable item used in crafting skills such as Cooking and Cheesemaking. Cows with a Vegetarian badge can produce milk faster than cows with a varied diet, however skill level and the version of Collect Milk used also impact collection times.
Adventurers can also milk cows, however consent must be given.

Deer

Deer is considered to be a good foundation for an off-tank. While cows receive overt tank abilities, survivability in deer primarily comes from Deer Treasure Effects on equipment. Deer have the ability to jump faster and higher than other land-based Beast Forms using Bounding Escape. They also have AoE taunts, while cows only have single target taunts.
Deer can use the ability Summon Deer to summon a wild deer to help them in battle.
Some deer are actually Druids, using the Deer Form toggle ability.

Spider

Spider form is useful for DPS/Assassin type builds. Spiders deal predominantly Crushing and Poison damage to quickly defeat enemies. Many spiders rely on Incubate, an ability that injects eggs inside enemies, dealing massive damage and spawning a pet spider. Spiders spawned through this ability will aid their parent in battle.
Spiders have the ability to use Insidious Illusion to temporarily talk with Animal Hating NPCs. This ability has a 20 minute cooldown and consumes a

Moonstone
each time it is used.
Spiderweb
can be produced by Level 60 Spiders using Webspin. This ability can give spiders an advantage in Textile Creation and Tailoring, which is helpful if they want to craft the spider-form Tailoring equipment.

Pig

Rabbit

Giant Bat

Lycanthropy

Spirit Fox

The same can be said about Werewolves and Giant Bats, they're both known for their damage and their ability to keep the pressure on.

Pigs are your support build, they can solo decently, but they are better off in groups, as a healer or a buff build with use of Mudbath, Frenzy, Porcine Alertness.

Rabbits offer a stealthy playstyle.

Druids by themselves should NOT be classified as a Beast Form. However Druids are given spells that will allow them to assume certain beast appearances like Deer, Raven and Mallard.

Advantages

Pigs have two sidebar abilities Terror Dash, which gives them a sprint bonus, and Truffle Sniff which allows them to sniff for mushrooms, I believe the higher the Truffle Sniff the higher lvl Mushroom you are likely to get, or the higher the chances you are of getting a mushroom.

Rabbits are the only Beast Form capable of using Ice Magic by equipping a special headgear item.

Giant Bats have the ability of Echolocation which allows them to see in the dark, such as dungeons (especially helpful with Claudia), and they do have the ability to Fly, they also have the ability to turn players into Bats, so be careful when facing them in PvP.

Wolves have the ability to switch in and out of wolf form(except during Full Moon, when they are stuck for 3 days), they also have specific Wolf-Altar/Wolf benefits, the altar can unlock higher lvl abilities, has the option of being a storage space, and by completing quests for the Altar you can get bonuses like Extra Armor, Power, Health, Damage Mitigation, Bonus Attack %, or a Sprint Speed bonus.

Familiar's Recall

Icon	Level	Name	Description	Special	Effects	Stats	Source
	0	Familiar's Recall	Sends you back to your master. You must be a long-term animal with a bonded master, and you must be wearing a Familiar Recall Collar.	Can Be On Sidebar		Power Cost: 50 Range: 5 Cooldown: 1800	???

Using a Recall Collar, a character using one of the Beast Forms may directly teleport to their master using the Familiar's Recall ability. This ability can be used from anywhere, as long as the player has been in animal form for the past 3 hours of in-game real time.

This ability is learned from their master:

Cinnamon the rabbit in Animal Town is currently the only NPC offering a bond, but he implies that other NPCs will offer this service in the future.