Tierra

Tierra is the starting planet of all saves. It has all the resources necessary to repair the spaceship to launch from. The atmospheric pressure is 1 atmosphere throughout the whole planet. The planet has one moon: Luna. It's the Cosmorists analog of Earth, with basic characteristics, such as mass, diameter, and atmospheric elements being nearly identical to Earth.

## Biomes

### Surface biomes

The planet Tierra has 13 surface biomes to explore.

#### Plains

The plains biome is the most common starting location of the player. It contains plant foliage, some rocks and ores scattered around, and few pin oak trees. There are some areas where pin oak trees spawn densely together like in most forest biomes with any tree type, as well as rarely having some cherry blossom trees. Temperatures here vary more here from 10°C to 30°C with some areas being lower or higher than this range. This biome will usually spawn around 30 to 60 degrees from the equator on both hemispheres.

#### Savanna

The savanna biome is a common biome that commonly spawns close to the player's starting area. It contains some acacia trees, some rocks and ores, and plant foliage. Just like in the plains biome, acacia trees can spawn densely together at some locations. Temperatures here most commonly hover between 25°C and 30°C with occasional moments where it's out of this range either just before sunrise, or just before sunset. They'll usually generate at or near the equator.

#### Shrublands

The shrublands biome is a common biome that just like the savanna, can commonly spawn close to the player's starting area. There are some seeds where this biome is the spawning area, but is much less frequent than spawning in a plains biome. It's characterized by bare shrubs scattered throughout the biome, and can be a plentiful source of wood if trees aren't around frequently in the plains biome. This biome usually generates between 25 and 60 degrees from the equator.

#### Desert

The desert biome is a hot biome that typically spawns adjacent to a savanna biome, and occasionally the shrublands. It's characterized by a sandy ground, sandstone rocks, and some patches with bare shrubs different from the ones that spawn in the shrublands, and patches of cacti in some places. It can either be bare with no plant life, or have a moderate amount if cacti and bare shrub patches overlap. Temperatures here are commonly between 30°C and 50°C with occasional spots and times where it goes outside this range. It generates at or near the equator in abundance.

#### Rocky Desert

The rocky desert biome is the hottest surface biome on the planet. It's characterized by only sandstone and ores with a rocky ground instead of a sandy ground. Temperatures here commonly exceed 40°C with only occasional patches and times where it goes below this temperature. A heat resistance buff is advised to explore this biome. This biome is the most common biome at and near the equator by far.

#### Subtropical Forest

The subtropical forest biome is a warm (sometimes hot) biome characterized by a denser packing of pin oak trees than the plains biome. Temperatures here commonly range from 25°C to 40°C and generates most commonly between 10 and 45 degrees from the equator with uncommon patches of it beyond these points.

#### Jungle

The jungle biome is a warm (occasionally hot) biome characterized by thick foliage, crowded packing of palm trees, green stones that spawn instead of gray ones in most biomes, and occasional patches of bamboo. It has the highest spawn rate of any enemy in any surface biome, as lush slimes spawn here abundantly, making it a good source of slimeballs, and with lots of trees around, a place to get lots of torches. This biome is the most difficult to navigate due to the palm trees being hard, and closely packed together, requiring lots of axes to set up a base here. Temperatures here commonly range from 30°C to 40°C and generates between 10 and 40 degrees from the equator with uncommon patches of them that can rarely cross the equator.

#### Swamp

The swamp biome is a temperate (sometimes warm) biome characterized by a dense packing of willow trees, a dark, slightly desaturated green grass, and plant foliage. Temperatures here commonly range from 20°C to 30°C and generates most commonly between 15 and 45 degrees from the equator.

#### Rocky Fields

The rocky fields biome is a biome characterized by a denser packing of rocks, slightly more ore, and a gray rock texture. This biome has the broadest temperature range of any biome, and can range from -5°C to 30°C. Due to it's broad temperature range, this biome also occupies the broadest latitudes, generating from 20 degrees to the equator to both polar regions.

#### Temperate Forest

The temperate forest biome is a cool (sometimes cold) biome with a consistent abundance of oak trees, greener grass, and some rocks, Temperatures here most commonly range from 5°C to 20°C and generates from between 20 and 60 degrees from the equator.

#### Tundra

The tundra biome is a cold biome with mostly rocks, ores, and occasional foliage scattered about with desaturated blue grass. It's the most common biome apart from the savanna and shrublands biomes, and acts as a colder variant of the plains biome. Temperatures here most commonly range from -5°C to 10°C and generates between 40 degrees from the equator to the polar regions.

#### Taiga

The taiga biome is a cold biome characterized by a dense packing of pine trees, cranberry bushes, occasional patches of birch trees, closely packed rocks, some ores, and some purple plant foliage. It's one of the least dangerous biomes when it comes to enemies, but consistently cold temperatures will still necessitate caution to avoid hypothermia for longer stays. Temperatures here most commonly range from -15°C to 5°C and generates between around 45 degrees from the equator to the poles.

#### Frozen Plains

The frozen plains biome is the coldest surface biome on Tierra characterized by an endless sea of ice rocks scattered around, some ores, and a bright icy ground. Frostbitten slimes commonly spawn here. Temperatures here are consistently below 0°C, with rare locations and times where it dips as low as -30°C and will generate exclusively near the poles, going at most 30 degrees from the poles before they become rare.

### Cave biomes

Tierra has 17 explorable cave biomes as of alpha 0.19.

#### Dirt Caves

The dirt cave biome is a common cave biome, typically spawning below the player's spawn point along with the berry and mushroom caves. Rock slimes spawn commonly here, and the deeper you go, the more common bats become. It's characterized by a slightly pale orange dirt ground texture, mostly gray cave walls, some cave berries, more common ores, and uncommonly some green crystals. Temperatures here can vary more widely from 5°C to 40°C.

#### Berry Caves

The berry cave biome is a common cave biome that also has a chance to spawn below the player's spawn point. It's characterized by a greener ground texture, cave berry plants spawning more commonly here than the dirt caves, and some cave walls. It's always disconnected from the dirt caves unless another biome's cave wall generation is adjacent to this biome, and can connect it to the dirt caves, as the cave walls usually block it from the dirt caves.

#### Mushroom Caves

The mushroom cave biome is a common cave biome, and just like the dirt and berry caves, can spawn below the player's spawn point. It's characterized by a slight red/orange grass-like texture, abundant red mushrooms, and the usual cave elements such as cave walls, rocks, and ores spawning more commonly than in the surface. Just like the berry caves, it's also disconnected from the dirt caves, but can link to berry caves commonly.

#### Stone Caves

The stone cave biome is a biome that most commonly spawns deeper, most commonly spawning below layer 33 of the caves. It can spawn at shallower layers, but in shallow layers, this biome is restricted to spawning below the rocky fields surface biome. It's characterized by a stony texture, as well as iron ore spawning more commonly here than in the other biomes, even at shallower layers.

#### Dry Dirt Caves

The dry dirt cave biome is a transitioning biome between the dirt, berry, and mushroom caves, and the desert caves. It can commonly spawn on its own not connected to a desert cave, but is commonly adjacent to one. It's characterized by a cracked dirt texture, rocks being more packed together, and apart from that, it's similar to the dirt cave biome.

#### Desert Caves

The desert cave biome is a hot biome. It always spawns directly below a surface desert biome, or close to a desert. There's also a high chance for this biome not to spawn below a desert, and will usually spawn deeper in the interior of a surface desert biome. It's characterized by a ground sandstone texture, sandstone cave walls, sandstone rocks, and larger, but less common ore clusters. Temperatures here can commonly exceed 40°C.

#### Jungle Caves

The jungle cave biome is a warm biome. It usually spawn below jungles and sometimes swamps, but can also spawn a few layers below a savanna or even desert biome due to higher humidity values there. It's characterized by a richer green grass ground texture, scattered puddles of water, cave plants, cave berry bushes, and mossy cave walls. Poison tiles can spawn here, and the deeper you go, the more common they get. Temperatures here can range from 30°C to 40°C occasionally going outside this range.

#### Swamp Caves

The swamp cave biome is a temperate (sometimes warm) biome, At shallow layers, it's mostly confined to spawning below swamps, but at deeper layers, it's the most common wet cave biome. It's characterized by a more pale green grass texture compared to the jungle caves, a darker green cave wall, and poison tiles that spawn more frequently the deeper you go like in the jungle caves. Temperatures here can range from 20°C to 30°C occasionally going outside this range.

#### Tundra Caves

The tundra cave biome is a cold biome. The caves here are smaller compared to other biomes, but are closer together. It's characterized by a pale blue ground texture, and uncommonly, frost flora plants. Temperatures here can range from -5°C to 10°C.

#### Taiga Caves

The taiga cave biome is a cold wet biome. It primarily spawns below taiga biomes, but at deeper layers, can spawn below frozen plains biomes as well. It's characterized by a bluish grass ground texture, the usual gray stone walls, and frost flora plants that spawn more commonly here than the tundra caves. Temperatures here can range from -10°C to 5°C.

#### Ice Caves

The ice cave biome is the coldest cave biome. It's restricted to spawning below frozen plains biomes, and the deeper you go, the less common they become. At a certain depth, it becomes impossible for them to generate. It's characterized by ice nodes, an icy ground texture, and ice cave walls spawning at exposed parts of the cave. Temperatures here are consistently below 0°C.

#### Arachnid Caves

The arachnid cave biome is a wide temperature biome. It's characterized by a brown slightly purplish ground texture, and an abundance of cobwebs. Spiders don't spawn here yet as of alpha 0.19.

#### Dark Caves

The dark cave biome is the most common deep cave biome. It's the biome that almost always spawns below the spawn point, and at certain depths, is the only cave biome that spawns. It's characterized by darker rocks and cave walls, as well as most ores, especially iron and gold, being more abundant here.

#### Wilting Caves

The wilting cave biome is the only other deep cave biome on Tierra that spawns. It typically spawns deep below wet forested biomes. It's characterized by pale green grass, poisonous tiles spawning commonly, and occasional plant foliage.

#### Lava Caves

The lava cave biome is the deepest cave biome, and is also the hottest one on average in all of Tierra as of alpha 0.19, spawning at and below layer 240. It spawns below all biomes at the surface. The deeper you go, the more common lava tiles become. It's characterized by slightly red cave walls and rocks, more red base tiles, lava tiles, smoke vents (they don't emit smoke so far), and an abundance of iron ore, and at deeper depths, gold, then magtise ore become common as well. Temperatures here are commonly above 40°C, and when hundreds of km deep, can reach hundreds of degrees C, and even into thousands depending on the depth, but this would usually only happen at thousands of layers deep.

#### Magma Forest Caves

The magma forest biome is one of the only other lava cave biomes, and unlike the swamp, jungle, and wilting caves, can spawn anywhere, even below arid regions like the rocky fields. It's characterized by an abundance of magma trees, larger gold magtise ore nodes, and slightly red rocks.