Lethe

## Paradise Habitability

> *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.*
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> *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.*
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## About

Lethe Is a fictional planet in TerraGenesis, and one of the two planets that already has cities when start the game, the other being Earth. Lethe's cities are abandoned, so build habitations first.

If play Lethe with the Biospheres function, it starts out with a lot of the same species as Earth does. 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 planet go, all species will die out.

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. can conduct terraforming for after get all that revenue.

Assuming you are using Biomass, you may basically turn off any terraforming buildings Lethe has in order to save credits, because Lethe is already habitable. Since the planet is already habitable, all one needs is 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 need to counterbalance is the spaceports. If play with Biospheres, will also 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 not using biospheres mode, an increase in biomass. If in biospheres mode, plant support is already sufficient.

## Biosphere

Lethe has 78 species when start a new game. Click the links for more info on biospheres and phyla and traits. It's the exact same biosphere Earth has.

## 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!

The mass disappearance on the planet is caused by a disease called the Lethe Plague. The Lethe Plague attacks the brain and causes a complete loss of memory. The disease event will slowly decimate the planet's landing party and any population it has established.
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%.

~~On my playthrough of Lethe I was able to finish before the Plague ever made an appearance. I assume this was because I saved up 20 culture points and spent them all at once. This would need confirmation by multiple players, but it seems likely that the Plague only gets introduced after reach a certain victory (or in Lethe's case it's called investigation) score~~. Don’t care didn’t ask Iboutacum [1]