Lore of Rain World

This page contains the lore and backstory of Rain World. The contents of this article should always be supported by evidence from texts and excerpts found in the game.

Please discuss potential changes on the talk page to ensure your additions are valid.

The events that transpire from the start to the end of the Rain World universe are complicated and entangled. The 's journey across the world is also riddled with clues and subtle messages of the past.

A number of pieces of evidence and excerpts acquired over the course of the game's storyline offer a logical and well-supported explanation in regard to the cause of the world's current state of decay and disrepair.

The game's original timeline is separate from the events of the Downpour DLC, which is considered an official alternative universe. For this reason, all Downpour-related lore has its own comprehensive page.

The Ancients and Void Fluid
Eons ago, an ancient civilization inhabited the planet. Even such a developed society could not escape the grasp of the Great Cycle that impacted all living creatures. Birth, death and rebirth were connected to each other like a ring, making true death impossible. Death would simply result in a new awakening—a restart, a repeat. Stuck within a deathless loop of agonizing longevity, it had long been this civilization's goal to break free of this cycle—a process known as transcendence.

Even far before the storyline of Rain World began, methods and spiritual instructions were devised by beings such as monks to rid oneself of natural urges. These methods were practiced in an effort to escape the Great Cycle, but there is no indication that these instructions were able to achieve any success.

The situation changed drastically, however, with the Void Fluid Revolution. At some point in their history, the ancient civilization discovered what later came to be known as Void Sea far below the surface in the Depths. The Void Sea was comprised entirely of Void Fluid. While it was difficult to harvest the fluid due to its nature of dissolving anything that comes into contact, devices known as Void Drills were invented to gather up small amounts Void Fluid embedded in rocks slightly above the Void Sea, where its concentration is lower and wouldn't pose a risk to the equipment. The impurities such as rock and sediments were then filtered out to obtain a sample of the pure liquid.

This fluid was soon found to be an outstanding source of energy. Technological advancement quickly boomed, and the ancient civilization reached the height of its power.

After further studies, it was found that the Void Fluid does not just dissolve objects, it also removes them from the physical realm. Attempts were made to dig even deeper into the Depths to find higher concentrations of Void Fluid as well as uncover more information about it, but the ancients' equipment simply broke or dissolved. As later described, no one returned if they ventured too deep into the Depths. However, this property of the Void Fluid coincided with what the ancients thought to be the solution to escaping the Great Cycle. The civilization believed that the ability of the Void Fluid to remove one from the physical world was the transcendence they had longed for. Since any that came into contact with Void Fluid did not return, it was inferred that they must have broken free of the cycle. However, a risk was associated with taking the plunge into Void Sea to escape the world. Not even Void Fluid was enough to remove those with sufficiently large egos from the physical realm. This resulted in some "horror stories" in regards to semi-transcended abominations. Several ancients that did not entirely transcend are likely to be the six Echoes scattered in the world. These creatures claim to know how to transcend, but express a sense of regret and sorrow at being trapped between the mortal realm and the transcended realm.

In order to transcend, it seems that one would have to abandon all attachments and desires, entering an "effortless" state. The ancients once again turned to archaic methods to rid of one's natural urges and ego before deciding to use Void Fluid in order to avoid failure in transcendence. However, this seemed not to be an entirely perfect solution, which would explain why Iterators were constructed (see below).

Creating and Using the Iterators
The ancient civilization began using its technological prowess to create and construct the iterators. Iterator was the name given to artificial superintelligences of colossal size and incredible power that were constructed to solve the 'Great Problem'—to find the method of breaking free of the Great Cycle without the use of Void Fluid.

Seven iterators have been named but there are up to twelve total (including the named seven) which have been seen in-game. The seven mentioned are:
 * (5P)
 * (LttM,BSM[*])
 * (SoS)
 * Seven Red Suns (SRS)
 * Chasing Wind (CW)
 * Unparalleled Innocence (UI)
 * No Significant Harassment (NSH)


 * "Big Sis Moon" to Iterators she is close to.

The Iterators were a combination of organic and synthetic components, relying on specially grown microorganisms as peripheral processing devices: their natural metabolism and reproduction could perform very complex calculations beyond the capabilities of electronics physically. In order to keep their electronic components cool and their organic components clean, iterators required absolutely gargantuan amounts of water. The iterators stripped their nearby ecosystems of water and pumped water vapor back into the atmosphere, where it would condense into rain and be used again. Due to this process and the sheer number of iterators built, the equilibrium of the world's ecosystems was severely disrupted or even destroyed, creating a dense layer of fog and clouds rife with torrential downpours and periodic flooding. Ultimately, this effect came to be known as the Rain. The ancient civilization compensated for this by moving away from living on the surface, and constructed immense, dense cities directly on top of the surface of the iterators' "cans"—massive, square shaped buildings which protruded like islands far above the cloud layer. In addition to computing the solution to the Great Problem of transcendence, the iterators were tasked with providing regular shipments of food, water, equipment and Void Fluid for energy to these colonies.

Fall of the Ancients and Pebbles' Madness
Unfortunately, the ancient civilization disappeared and collapsed before the iterators computed the solution to the Great Problem due to a massive transcendence movement of the entire population, leaving the surface cities dark and abandoned if largely intact. However, the iterators were left turned on, their final command being to continue working towards a method to transcend without using Void Fluid and guide lesser creatures on the path to the realm beyond should the solution ever be discovered. Over the next indeterminate amount of cycles up until the start of the game, the iterators did not achieve any major breakthroughs. Only claimed to have uncovered the solution, but she died almost simultaneously as the confirmation of success was broadcasted to the other iterators, causing the methods in which she attained this positive result to be lost.

Unable to find the solution after 's ascension and growing increasingly frustrated, another iterator—Five Pebbles—became convinced there was no solution to the great problem, there was no reason to keep trying to solve it, and that death was the only way out. It is likely he showed these beliefs off in iterator chat logs under the pseudonym EP, or Erratic Pulse. The ancients had anticipated this kind of thinking, however, and put taboos preventing self destruction within the iterator's genetics. One (and perhaps the only) way to circumvent these taboos was a very dangerous and repetitive shuffling of genetics that required a heightened water intake. The goal was to cause cells to mutate until the desired genetics were obtained: ones that would overwrite the encoded taboos. It is very likely Five Pebbles used this method to attempt overwriting his genetics. At some point Five Pebbles began drawing several times the usual amount of water, tapping into the neighboring iterator, Looks to the Moon's water source. Attempts by Moon to persuade Pebbles that water shortages would be fatal to her failed and she had to leverage her seniority in an attempt to make him stop, to which Pebbles responded that this plea has "ruined everything". Upon being interrupted, Five Pebbles lost focus of his genetic shuffling, and it is likely it became what is known as the Rot (or Daddy Long Legs). Five Pebbles attempted to rid his systems of the Rot, doing things such as flushing it out into Garbage Wastes, but it has proven resilient and still resides within him, slowly consuming more and more, day by day. It is unknown if Five Pebbles still uses extra water during the time that the three playable s take place in. Due to many cycles lacking water, Looks to the Moon's processes eventually seized, her facility compromised, and her primary cognitive unit descended into an amnesic, near-death state. The fate of Seven Red Suns, Chasing Wind, and Unparalleled Innocence is unknown, but No Significant Harassment is active and well at the start of The Hunter's story.

The Timeline of the Hunter, Survivor, and Monk
Hunter is sent by NSH with a pearl and a slag-reset neuron to help Moon in her state of decay. The Survivor's story is based on the scenario that the delivered the neuron and revived Moon, with the rest of their choices unknown. In the Hunter's transcendence scene, the Hunter is seen with a strange purple goo coming out of it, before being seen in the arms of an iterator-like figure, presumably NSH.

One interpretation of this cutscene is that the Hunter was injected with some of NSH's microbes, and then sent by NSH to transcend under the cover of helping Moon. The goo seen coming out of the Hunter is believed to be these microbes. This also explains Hunter's sickness- like in the Iterators, slag would build up off these microbes being worked, and would thus lead to organ failure in the organism. By doing this, NSH was able to effectively break the self-destruction taboo, enabling them to transcend with the Hunter.

A second interpretation is that the goo is the Hunter's sickness (in this case presumed to be either cancer or some other terminal illness rather than slag buildup) being removed from their body upon transcending.

Sometime after these events, is separated from their family by heavy rainfall, and is eventually guided by one of Moon's s. The  leads the Survivor towards Moon with images of their family and encourages the Survivor to bring additional neurons to repair her memory. After visiting Moon, the Survivor travels to Five Pebbles, achieves the Mark, and transcends. However, the player can choose to not transcend and/or steal neurons from Five Pebbles and give them to Moon. The player can also skip visiting Pebbles and Moon entirely, and instead pursue the es to gain maximum karma and transcend that way. The Survivor, upon transcending, is taken to the Void where many other transcended s are shown.

The is seemingly a younger sibling to the Survivor, jumping after their older sibling during the beginning cutscene. The Monk's story seems to take place shortly after the Survivor's story, but long enough that the world's have faded and no longer contain information. The Monk is left with the same options as the Survivor in terms of meeting the iterators and transcending. As of 1.7, it is revealed in the Monk's ascension cutscene that it finds the Survivor's spirit in the Void.

The ending cutscenes could also be interpreted as the s' wishes manifesting as final dreams as they lose consciousness in the void fluid: the Hunter dreaming of being back with NSH, the finding their family and the  being reunited with their sibling.