Lethe was one of humanity's first successful colonies in another solar system. It was thriving, a jewel of our burgeoning galactic civilization, until ten years ago when the entire population, almost 50 million people, vanished.
You have been tasked with investigating the mass disappearance, and your ship is about to make landfall. Begin by establishing Habs in the abandoned colonies to get them up and running. From there you can begin to re-populate the planet, and try to figure out what happened.
About[]
Lethe Is a fictional planet in TerraGenesis. It is one of the only two planets that already has pre-established cities when first starting the game, with the other being Earth. Lethe's cities are abandoned however, and the gameplay will have you solve the mystery of what happened to the settlers.
If play Lethe with the Biospheres function, it starts out with a lot of the same species as Earth due to it being a terraformed colony. Additionally, the starting biosphere is not oxygen neutral. The planet gains 15 parts per million of oxygen per minute. You will need to counteract this quickly. If let the oxygen levels spiral out of control, it will lead to a mass extinction event and the former settler's terraforming efforts will be undone as Lethe returns into being a barren pinkish-red rock.
Lethe has one moon, Moneta of size class III (average).
Strategy[]
Lethe already has empty cities, so you don't need to spend space credits on buying extra ones, which can give you an advantage. Place basic hab units (that don't change anything about any stats levels) and wait for the The League random event to pop up a couple of times, so get ridiculous amounts of revenue. You can resume the terraforming process once you acquired enough credits.
Assuming you are using Biomass, you can just turn off any terraforming facilities Lethe has in order to save credits, because Lethe is already habitable. And since the planet is habitable, all you need are spaceports to increase population (which also allows you to build orbital structures) and the native birthrate will take care of the rest. The planet's massive amount of starting biomass is enough to support hundreds of thousands of people for a number of days - enough time to get started with coral reefs and spaceports, or even Sequestration Plants.
If you use Biomass, the only thing you need to counterbalance is the spaceports. If play with Biospheres, you will need to balance out the oxygen levels, either with oxygen filters, or with preexisting higher level facilities. However, the latter may not always be possible.
Temperature, oxygen and water are already at paradise levels, making a gaian playthrough only require pressure reduction and, if you're not using the biosphere mode, an increase in biomass. If in biosphere mode, plant support is already sufficient.
Biosphere[]
Lethe has 78 species when you start a new game. Click the links for more info on biospheres and phyla and traits. It's the exact same biosphere Earth has.
Species | Phylum | Trait 1 | Trait 2 | Trait 3 | Kingdom | DNA |
---|---|---|---|---|---|---|
Psychrophiles | Archaea | Cold Adapted | Cold Adapted | Cold Adapted | Aquatic Microorganisms | AAAATGGATGATGAT |
Thermophiles | Archaea | Heat Adapted | Heat Adapted | Heat Adapted | Aquatic Microorganisms | AAAATGGAAGAAGAA |
Anabaena | Cyanobacteria | Nitrogen-Fixing | Nitrogen-Fixing | Nitrogen-Fixing | Aquatic Microorganisms | AAAATCCTTCTTCTT |
Lyngbya | Cyanobacteria | Large | Infectious | Infectious | Aquatic Microorganisms | AAAATCGGACTACTA |
Oscillatoria | Cyanobacteria | Large | Large | Beautiful | Aquatic Microorganisms | AAAATCGGAGGAGCG |
Stromatolite | Cyanobacteria | Large | Low Oxygen Adapted | Large | Aquatic Microorganisms | AAAATCGGAGTTGGA |
Coscinodiscophyceae | Diatom | Low Metabolism | Low Metabolism | Low Metabolism | Aquatic Microorganisms | AAAAGAGGCGGCGGC |
Large Diatom | Diatom | Large | Large | High Metabolism | Aquatic Microorganisms | AAAAGAGGAGGAGGG |
Pennales | Diatom | High Metabolism | High Metabolism | High Metabolism | Aquatic Microorganisms | AAAAGAGGGGGGGGG |
Large Plankton | Plankton | High Metabolism | Large | Large | Aquatic Microorganisms | AAAAGTGGGGGAGGA |
Phytoplankton | Plankton | High Metabolism | Photosynthetic | Photosynthetic | Aquatic Microorganisms | AAAAGTGGGCGGCGG |
Zooplankton | Plankton | High Metabolism | Large | High Metabolism | Aquatic Microorganisms | AAAAGTGGGGGAGGG |
Stonewort | Stonewort | Small | Cold Adapted | Humidity Adapted | Aquatic Algae | AATAGGGGTGATGTG |
Chlorella | Green Algae | Photosynthetic | Photosynthetic | Small | Aquatic Algae | AATAGCCGGCGGGGT |
Green Algae | Green Algae | Small | High Metabolism | High Metabolism | Aquatic Algae | AATAGCGGTGGGCGG |
Killer Algae | Green Algae | Small | Invasive | Invasive | Aquatic Algae | AATAGCGGTCAACAA |
Marimo | Green Algae | Cold Adapted | Beautiful | Delicate | Aquatic Algae | AATAGCGATGCGCAG |
Watermelon Snow | Green Algae | Beautiful | Cold Adapted | Cold Adapted | Aquatic Algae | AATAGCGCGGATGAT |
Giant Kelp | Kelp | Large | Large | Large | Aquatic Algae | AATACAGGAGGAGGA |
Macrocystis | Kelp | High Metabolism | High Metabolism | High Metabolism | Aquatic Algae | AATACAGGGGGGGGG |
Sargassum | Kelp | High Metabolism | Large | Heat Adapted | Aquatic Algae | AATACAGGGGGAGAA |
Seaweed | Seaweed | High Metabolism | Invasive | Domesticated | Aquatic Algae | AATACTGGGCAAGCT |
Wakame | Seaweed | Cold Adapted | Invasive | Fruit-Bearing | Aquatic Algae | AATACTGATCAACGA |
Soft Coral | Coral | Beautiful | Delicate | Delicate | Aquatic Herbivore | AAGACGGCGCAGCAG |
Stony Coral | Coral | Beautiful | Beautiful | Delicate | Aquatic Herbivore | AAGACGGCGGCGCAG |
Shrimp | Crustacean | Small | Domesticated | Domesticated | Aquatic Herbivore | AAGACCGGTGCTGCT |
Parrotfish | Fish | Large | Beautiful | Beautiful | Aquatic Herbivore | AAGTAAGGAGCGGCG |
Reef Fish | Fish | Small | Beautiful | Heat Adapted | Aquatic Herbivore | AAGTAAGGTGCGGAA |
Manatee | Mammal | Large | Low Metabolism | Large | Aquatic Herbivore | AAGTATGGAGGCGGA |
Whale | Mammal | Large | Large | Large | Aquatic Herbivore | AAGTATGGAGGAGGA |
Sea Turtle | Reptile | Large | Low Metabolism | Beautiful | Aquatic Herbivore | AAGTAGGGAGGCGCG |
Spider Crab | Crustacean | Large | Large | Scavenger | Aquatic Carnivore | AAGACCGGAGGACCC |
Salmon | Fish | Social Behavior | Large | Domesticated | Aquatic Carnivore | AAGTAACCAGGAGCT |
Tuna | Fish | Large | Large | Domesticated | Aquatic Carnivore | AAGTAAGGAGGAGCT |
Seal | Mammal | Cold Adapted | Cold Adapted | Social Behavior | Aquatic Carnivore | AAGTATGATGATCCA |
Shark | Mammal | Large | Social Behavior | High Metabolism | Aquatic Carnivore | AAGTAAGGACCAGGG |
Crocodile | Reptile | Heat Adapted | Heat Adapted | Large | Aquatic Carnivore | AAGTAGGAAGAAGAA |
Frankia | Actinobacteria | Nitrogen-Fixing | Nitrogen-Fixing | Nitrogen-Fixing | Terrestrial Microorganism | AACATGCTTCTTCTT |
Nocardia | Actinobacteria | Large | Infectious | Airborne | Terrestrial Microorganism | AACATGGGACTACTG |
Soil Bacteria | Actinobacteria | Large | Nitrogen-Fixing | Nitrogen-Fixing | Terrestrial Microorganism | AACATGGGACTTCTT |
Streptomyces | Actinobacteria | Nitrogen-Fixing | Airborne | Infectious | Terrestrial Microorganism | AACATGCTTCTGCTA |
Arctic Lichen | Lichen | Cold Adapted | Cold Adapted | Small | Terrestrial Microorganism | AACTTAGATGATGGT |
Crustose | Lichen | Large | Beautiful | Beautiful | Terrestrial Microorganism | AACTTAGGAGCGGCG |
Tree Lichen | Lichen | Cold Adapted | Low Metabolism | Beautiful | Terrestrial Microorganism | AACTTAGATGGCGCG |
Black Mold | Fungus | Poisonous | Poisonous | Invasive | Terrestrial Microorganism | AACTTTGCCGCCCAA |
Bracket Fungus | Fungus | Large | Nitrogen-Fixing | Beautiful | Terrestrial Microorganism | AACTTTGGACTTGCG |
Honey Mushroom | Fungus | Large | Large | Large | Terrestrial Microorganism | AACTTTGGAGGAGGA |
Yeast | Fungus | High Metabolism | Domesticated | Domesticated | Terrestrial Microorganism | AACTTTGGGGCTGCT |
Malaria | Protozoa | Poisonous | Infectious | Poisonous | Terrestrial Microorganism | AACTTGGCCCTAGCC |
Bamboo | Grass | Large | Large | High Metabolism | Terrestrial Plant | ATATTCGGAGGAGGG |
Cereal Grains | Grass | Domesticated | Cash Crop | Fruit-Bearing | Terrestrial Plant | ATATTCGCTCTCCGA |
Lawn Grass | Grass | Small | Domesticated | Domesticated | Terrestrial Plant | ATATTCGGTGCTGCT |
Tussock | Grass | Cold Adapted | Large | Large | Terrestrial Plant | ATATTCGATGGAGGA |
Sheet Moss | Moss | High Metabolism | Small | Domesticated | Terrestrial Plant | ATATGAGGGGGTGCT |
Tree Moss | Moss | Humidity Adapted | Cold Adapted | Beautiful | Terrestrial Plant | ATATGAGTGGATGCG |
Flowerbush | Shrub | Flowering | Beautiful | Cash Crop | Terrestrial Plant | ATATGTCGCGCGCTC |
Hedge | Shrub | Large | Domesticated | Cash Crop | Terrestrial Plant | ATATGTGGAGCTCTC |
Ivy | Shrub | Domesticated | Invasive | Flowering | Terrestrial Plant | ATATGTGCTCAACGC |
Maple | Tree | Deciduous | Large | Beautiful | Terrestrial Plant | ATATGGCGTGGAGCG |
Palm | Tree | Heat Adapted | Humidity Adapted | Fruit-Bearing | Terrestrial Plant | ATATGGGAAGTGCGA |
Pine | Tree]] | Cold Adapted | Cold Adapted | Cash Crop | Terrestrial Plant | ATATGGGATGATCTC |
Redwood | Tree | Large | Large | Large | Terrestrial Plant | ATATGGGGAGGAGGA |
Parrot | Bird]] | Beautiful | Beautiful | Beautiful | Terrestrial Herbivore | ATTTCAGCGGCGGCG |
Ant | Insect | Small | Social Behavior | Social Behavior | Terrestrial Herbivore | ATTTCTGGTCCACCA |
Bee | Insect | Small | Flying | Social Behavior | Terrestrial Herbivore | ATTTCTGGTCCTCCA |
Beaver | Mammal | Humidity Adapted | Humidity Adapted | Pair Bonding | Terrestrial Herbivore | ATTTCGGTGGTGCCG |
Camel | Mammal | Heat Adapted | Aridity Adapted | Aridity Adapted | Terrestrial Herbivore | ATTTCGGAAGTCGTC |
Deer | Mammal | Cold Adapted | Social Behavior | Beautiful | Terrestrial Herbivore | ATTTCGGATCCAGCG |
Elephant | Mammal | Large | Large | Large | Terrestrial Herbivore | ATTTCGGGAGGAGGA |
Horse | Mammal | Large | Domesticated | Beautiful | Terrestrial Herbivore | ATTTCGGGAGCTGCG |
Iguana | Reptile | Heat Adapted | Low Metabolism | Humidity Adapted | Terrestrial Herbivore | ATTTCCGAAGGCGTG |
Tree Frog | Amphibian | Small | Beautiful | Poisonous | Terrestrial Carnivore | ATTTGCGGTGCGGCC |
Bird of Prey | Bird | Large | Flying | Beautiful | Terrstrial Carnivore | ATTTCAGGACCTGCG |
Beetle | Insect | Small | Beautiful | Invasive | Terrestrial Carnivore | ATTTCTGGTGCGCAA |
Bear | Mammal | Cold Adapted | Cold Adapted | Large | Terrestrial Carnivore | ATTTCGGATGATGGA |
Big Cat | Mammal | Heat Adapted | Large | Social Behavior | Terrestrial Carnivore | ATTTCGGAAGGACCA |
Wolf | Mammal | Cold Adapted | Social Behavior | Nocturnal | Terrestrial Carnivore | ATTTCGGATCCACAT |
Snake | Reptile | Small | Beautiful | Poisonous | Terrestrial Carnivore | ATTTCCGGTGCGGCC |
Trivia[]
- Lethe is named after the Greek God Lethe who was a spirit of forgetfulness and oblivion.
- When start on Lethe, it's surface is red and dusty. In the Ending Cutscene, it is stating that it’s pinkish-redish sand is natural to Lethe.
- In Roman mythology, Moneta (Latin Monēta) was a title given to two separate goddesses: the goddess of memory (identified with the Greek goddess Mnemosyne) and an epithet of Juno, called Juno Moneta (Latin Iūno Monēta).
- Lethe is one of the only planets to have a plague.
- The Lethe Plague may only infect humans (and possibly other animals) according to the biosphere, which keeps many organisms from Earth.
Victory - Spoiler Alert![]
Unlike other planets, the objective on Lethe is to find a cure for the disease before the population reaches 0. However, it still uses the concept of using Culture Points to achieve victory; a cure for the Lethe Plague would be found when the victory bar reaches 100%.
Worlds | |
---|---|
Terrestrial Planets | Mercury · Venus · Earth · Moon (Luna) · Mars |
Moons of Giant Planets | Moons of Jupiter • Moons of Saturn • Moons of Uranus • Moons of Neptune |
Moons of Jupiter | Io · Europa · Ganymede · Callisto |
Moons of Saturn | Tethys · Dione · Rhea · Titan · Iapetus |
Moons of Uranus | Miranda · Ariel · Umbriel · Titania · Oberon |
Moons of Neptune | Triton |
Dwarf Planets | Ceres · Pluto · Charon · Makemake · Eris · Sedna |
TRAPPIST-1 | Damu · Aja · Huanca · Ruaumoko · Asintmah · Ostara · Aranyani |
Fictional Planets | Bacchus · Pontus · Lethe · Ragnarok · Boreas |
Historical Earths | Vaalbara · Rodinia · Cambria · Cretacea · Dania · Chibania · Ultima |
Random Planets | ∞ |