Revision 8

EXODUS is set roughly 40,000 years in humanity's future, inside the Omega Centauri star cluster: a globular cluster roughly 16,000 light-years from Earth, packed with on the order of ten million stars. In the game's fiction, that density of stars also means a density of habitable worlds, and the cluster's history is a long argument over who gets to keep them.

The first exodus

Around 2200 CE, Earth suffered an environmental collapse severe enough to drive a centuries-long evacuation. Successive arkships left the solar system for the Centauri Cluster, freezing or banking their crews for the long journey. The first wave arrived in the cluster after several thousand years of subjective ship time, but tens of thousands of years of objective time. Their descendants spread out, terraformed, and over millennia of selective engineering, transformed into the posthuman species the game calls the Celestials.

The first ships to make it broadcast the Green Signal, a message telling the rest of humanity where to come. Every ark that followed set course on it. The cruel joke is built into the physics: the crossing took decades of shipboard time for the later arks, but tens of thousands of years passed for the people who sent the signal, long enough for them to build empires and stop being human. What the first wave found was a cluster of empty, habitable Eden Worlds, hundreds of them, and they spread out across roughly twenty thousand years filling them.

The Celestials view themselves as humanity's natural successors. They built up a continent-spanning network of transit gates (commonly called the Gates of Heaven), restructured entire worlds, and assembled a body of advanced technology fragmented across the cluster as artefacts referred to in-fiction simply as Remnants. Some Celestial sub-castes accept later-arriving humans as cousins. Most see them as a primitive remnant species, fit for use or for extermination.

Lidon and the Aslan Dynasty

The player's home is Lidon, a moon in the Malakbel system orbiting the gas giant Galarus. Lidon was the destination of a comparatively late ark fleet, one whose passengers arrived to find the cluster already ruled by the Celestials and the older Traveler Dynasties. The fleet's flagship and most of its support craft were lost; a single hardened settlement on Lidon's hot pole is now home to the Aslan Dynasty, a community of salvagers, engineers, and traders headquartered in the Persepolis cityscape.

Persepolis is a vertical city sheltered against Lidon's hostile climate, with the Oupávia Space Tower as its most visible landmark. Other Lidon locations include Lyonesse, a coastal district. The dynasty maintains a small fleet of salvage ships, and its most accomplished pilots are inducted into the Traveler caste: relic hunters trusted to make decisions for the dynasty on missions where two-way communication is impossible.

The Traveler caste

Travelers are not a military. They are agents charged with the only job that crosses the time barrier in both directions: leave Lidon, find the Remnants and other treasures the dynasty needs to survive, and bring back not only the cargo but a decision. Out in the cluster, Travelers negotiate with Celestials, settle scores with rival human factions, and make calls on the spot, knowing that the political situation back home will have shifted by the time they return. Jun Aslan, the player character, is heir to that tradition.

For Jun's personal backstory and the Traveler's tools, see The Traveler: Jun Aslan and The Recycler and Railclaw.

The relativistic problem

Every interstellar trip in EXODUS is sub-light. The ships are fast enough to take advantage of relativistic effects, which means a Traveler can cross to a star a few light-years away in subjective days, but objective decades will pass at home. The Time Dilation mechanic turns that constraint into the central narrative engine of the game: every mission permanently reshapes who is alive, who is in power, and what the home dynasty looks like when the Traveler comes back.

The deep history of the cluster

Most of what a Traveler salvages was made during eras that ended long before humanity's late arks arrived. The official timeline breaks that history into a handful of load-bearing events:

The Archimedes Engine is the one with a countdown attached. It reshaped the cluster's geography, stabilising orbits, controlling atmospheres, and terraforming dead rock into new Eden Worlds until there were thousands of habitable planets instead of dozens. But the civilisation that built them died out ten thousand years ago and took the knowledge with it, so a failing Engine cannot realistically be repaired. When one goes, the world it supports can turn uninhabitable inside a single generation and everyone left on it becomes a refugee. Lidon runs on one.

The Apocalypse Titans are the other side of that coin: proof that a Remnant powerful enough to save a world is powerful enough to end one. Waking a hibernating Titan would hand humanity a guardian the Celestials would have to respect, or it would hand the cluster a monster nobody can switch off. That ambiguity is the standing argument behind Traveler work, and the reason Remnant recovery is framed as stealing fire from gods rather than shopping.

The Traveler's Creed

Travelers come from different homeworlds and answer to different dynasties, and the two things they share are a creed and a working philosophy. The First Principles are four words: assume nothing, question everything. The creed is recited in official material as:

We sail on the edge of lightspeed, where time moves differently. As each day goes by, years pass for those we leave behind. Our service, our sacrifice, discovers worlds, seeds hope, breaks empires. We are the Travelers.

The Rot

The central threat hanging over the campaign is the Rot, a Celestial virus that is driving humanity toward extinction. It corrupts the worlds it reaches, and the homeworld Lidon is among those it is killing. Jun’s genetic connection to ancient Celestial technology is what makes the search for a way to fight the Rot possible, and it drives missions out into the cluster to recover the relics that might hold an answer. The infestation leaves a physical mark in the field as well: bramble-like growth that the gauntlet Lance ability can clear.

Where the Rot came from is an open question inside the fiction, and the campaign has a named thread pointed at it. Phaedra's grandfather Elijah went missing, and he is said to hold a terrifying secret about the Rot's origins. Tracking him to the volcanic world Tsang is one of the two missions the studio has shown at length, and it ends with Jun holding a decision over what happens to him. Nothing published so far says what that secret is or which way the choice cuts.

Major factions at a glance

For a deeper look at each, see Celestials and Factions. All seven named engineered species are covered on Changelings, and the crystal symbiotes that give humanity its one real edge are covered on Silicates and Daemons.