One technological disaster followed another, centuries passed, until the Red Fog appeared on the planet. Any living creature that entered it risked their life: some emerged unscathed, some mutated and gained abilities, while others died within days. People and animals avoided the fog, and vegetation changed beyond recognition.
The fog would appear suddenly, spreading across the entire planet, driving people out of cities, and then vanish just as suddenly. After a few years, the fog became much less frequent, confined mostly to the swamps. Humanity concentrated in oasis cities where the Red Fog never appeared.
Isolation pushed humanity to develop new technologies suitable for this new way of life, such as implants that enhance bodily capabilities. Some replaced only one part of their body, while others replaced everything or left everything untouched.
However, there was a movement that saw the fog as divine punishment. They advocated for the rejection of human modification, while some advocated for the use of the fog as a test: if you survived, your sins were forgiven. They were known as the Scorched.
The mutated individuals gained an unprecedented connection with nature: they could accelerate plant growth by several times, enter symbiosis with them, and anticipate changes in nature. It turned out that fog mutants were tied to the Red Fog: they needed it to maintain their abilities. The most talented individuals went to live in the swamps, not hesitating to use the latest technical developments. Swamp dwellers built their homes based around structures from their previous life.
Drone caravans transport goods between oases. Swamp dwellers hunt them down to obtain the necessary resources. Oasis residents, therefore, employ Theseus Fighters, former humans turned into machines, to protect caravans and hunt the swamp dwellers.