Underground

The Underground is the most widespread zone of play and type of server on earth, but most of the player base inhabits the surface area and not going that deep due to the pressure, and tough rocks. The Underground has many biomes, the most notable being the Cave biome which deserves its own page. Some players construct burrows and tunnels to utilize this zone and provide some protection from the dangers of outside. Most notably human mains have built many tunnels and systems as extensions to their civilizations including bunkers which may come in handy for shelter during the next balance patch event.

## Rules

### Dirt

This server is mainly made up of soil, and rocks. This forces players in the server to speck into digging abilities to travel. Also because the server is covered in dirt and rock, smell is pretty useless as the dirt hides the odor.

### No Light

Like the Abyss server, there is rarely any source of light in the server, making eyesight pretty useless, unless trying to stay submerged in the dark soil. Most builds use increased touch to navigate this dark server, and they cover up or get rid of their eyes.

### Low Oxygen

Because the server is covered in dirt, it makes it easy to use up all the oxygen in a certain area. That's why most builds have a low metabolism to reserve energy, reuse and reserve the oxygen in its area, or specked into passive stamina regeneration.

### Pressure

Apart from the abyss this server has the most pressure compared to the other major servers that are currently available. Like most servers, the deeper you go the more pressure you will experience. This forces the builds that live here to apply points to pressure resistance.

## Stats

Due to rules said earlier, some stats are pretty bad and others pretty much needed to survive. Here are some notable stat changes

### Stamina

Due to the low oxygen, dirt, and pressure, spending points into the stamina stat is key to survival. This stat is the most important stat in the server.

### Power and Mobility

Due to low oxygen, dirt, and pressure, Power and Mobility cost much higher. That's why builds here either use cost-efficient movement options like squirming, or target a wide variety of prey and gain as much exp as they can.

### Intimidation

This stat is utterly useless in this server, as eyesight is useless in this server, making intimidation attempts on other underground builds futile, but some builds spent points into it to scare off predators from the surface.

### Stealth

Stealth in this server is completely different than stealth in other servers. Instead of camo, stealth in this server is based on the amount of disturbance you do to the environment. This is important as a majority of the top tiers in the Underground server detects players by movement.

## Factions

This is a tier list based around the usefulness of the faction in the current meta.

### F

Fish  and Cnidaria

Of all the factions in the underground server fish and cnidaria are unplayable. They are too reliant on water to gain oxygen, and mainly lack the digging abilities to be fully subterranean. Only a few fish builds inhabit the cave biome, but even then they are limited by the amount of water in their area. And are susceptible to changes.

#### Birds

The bird faction is made for the complete opposite, the air. The average bird build has feathers and hallow bones, terrible for digging. Their wings and legs are not made for digging. Only a few bird builds can dig and they only use it for nesting or to look for grubs. There is no way currently for any bird build to survive in the underground server.

### C

#### Reptiles

Reptiles in this server aren't that amazing in this server. Most of the abilities that define the reptile faction aren't that useful. Their scaly skin gives them some protection to most attacks underground but does nothing when they surface for air and get easily killed by surface dwellers. Their egg's hard covering is a hindrance underground, causing them to break due to the pressure, forcing the reptiles to lay the eggs under depressions in or under rocks. Theirs better guilds to play in this server.

### B

#### Annelid

This guild is the main guild when you think of a subterranean build. They are limbless and are covered in slime. They mainly speck into abilities rather than their stats like complete body regeneration, the ability gain exp from dead leaves, and one of the most cost effective ways to move. They populate every playable server in the game, and are very successful. They would be much higher is it wasn't for their defense stat, and being the bottom of the food chain and being greifed endlessly for an exp source. Like most of the worms in the games are just bots.

### A

#### Mammals

This guild is one of the most adaptable guild in the game. Able to inhabit the cold Arctic server, too the open Ocean, and their all mainly high tier. So what can stop them from entering this server? Their higher intelligence and speed compared to the average build allows them to easily locate food and threats. They do live birth so laying eggs is not an issue. The thing that holds most of them back is their warm-bloodedness, high intake of exp, and little stealth. Due to their warm-bloodedness, they require more oxygen, so when oxygen runs out the most mammal builds are basically screwed unless they find a fresh source of oxygen. Most subterranean build makes up for it with low use of oxygen or going into suspended animation (Naked Mole Rats). Their high speed and/or intelligence require more energy forcing the mammal to eat resources with lots of exp like worms, insects, and/or roots.

### S

#### Amphibians

Amphibians are the best faction for the underground server. Their passive stamina regeneration helps them regain stamina easily in damp dirt. Their eggs have no hard shell so they can lay them underground. They require less energy to sustain unlike the other vertebrates and can have access to low costing movement option (squirm) that worms use. And some builds in the faction have access to poison for self-defense too deter would be predators. They also spent points into needle-like teeth take down larger prey No wonder that the amphibians in the subterranean servers are very dominated like the Caecilian and Olm.

## Notable Builds

Boettger's Caecilian

Star-Nosed Mole

Naked Mole Rat

Olm

Earthworm

Hammerhead Worm

Mole Cricket

Mexican Mole Lizard

Worm Snake

Waterfall Cling Fish