Cave Evolution Game
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The Cave Evolution Game, known originally as simply Evolution Game, was the first of the evo threads to appear on /tg/. It was created by from Aether !GuYmUwz4mI. The game takes place in a cave system inhabited by a variety of small creatures, primarily the allos, billu, cryd, symet, and myrit.
Allos
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The Allos is a species of aquatic slug-like creatures which inhabit the deep pools of water within the cave.
Billu
Billu are the small mammalian creatures of the cave. They are also the most diverse in the way of different species. Two traits shared by all of the Billu are their ability of echolocation and a powerful sense of smell.
Bellowers
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Bellowers are the smaller, non-sapient species of billu. They are kept by the Tribal Billu as pets. They are completely blind, so they use echolocation to navigate the cave. On their sides they have two air sacks on their sides which the use to amplify their squeals into deafening shouts.
Tribals
Titans? Don't know if this is canon.
The Hive
Cryd
The most populous species and essentially the namesake of the Hive, the cryd are a species of arthropods with behaviors much like those of social insects such as ants and bees. They started as a blind, aquatic crustacean which ate the anemones in the water pools, but over time became land based and began to feed on sap from small plants they grew using their luminescent abdomens. When a massive salamander-like creature with 13 eyes emerged from the abyss of one of the water pools, a the Cryd entered into a symbiotic relationship with the Symet. Together, they struck down the beast, giving them its eyes, which when consumed, caused a number of mutations to arise in both species. From this, the hive first behaviors arose.
Symet
Nest Guardian Warrior Unnamed two-headed variety Dreg