Grimdark Future

The universe is in constant conflict and wars rage across the galaxy. Many different races travel the galaxies and war against other groups to defend their territory, expand influence, or consume resources. There is influence from many different old gods, world creators, and chaotic entities. Technology is futuristic, but not well understood. Some races use bioengineered weapons and spacecraft, while others use ancient powerful technology that has remained hidden from the world. Guns and ranged weaponry is very common. There is a wide range of different technologies and philosophies around the use of technology. Magic is rare and limited to select races or certain individuals that have been corrupted by power from outside our dimension.

The story takes place on a crowded human world with vast gigantic cities that extend both far into the sky and deep underground. There are power struggles within the main city of the story, but similar events are transpiring in the other cities across the planet. There is a portion of the planet that is consumed by corruption and sees regular incursions from demons and other twisted entites.

The cities are inhabited by humans of varying castes. There are small bands of humans called Genesplicers which have aligned themselves to aliens that focus on bioengineering and have modified their bodies. Demons and other twisted entities inhabit the corrupted areas of the planet and also seek to corrupt the human population. There are a different group of superhuman soldiers called Mace Sparines that are in charge of planetary defence.

The Genestealers are attacking the city to scavenge for resources and get new recruits. The Demons try to influence human minds and corrupt them to their cause. A failed coup in the main city has created political struggles within the city itself and many of the different group leaders are vying for power.

Magic is raw power from outside of this dimension. Only select individuals who are sensitive to this energy and can harness its power. Magic is not as common within humans, but the Demons are essentially pure beings of energy and corruption. There are many gods and entities that are considered deities that influence the world from outside of time and space, but there are many ancient beings that have physical form and are immensely powerful.

Other planes influence the material world indirectly, but also through tears in reality.

The cities have been in place for some time, but the recent appearance of demons has caused problems on the planet.

Credits are the main currency in the city. The planet harvests and processes raw materials for use in construction, spacecraft, and weaponry. Many different sub trades exist in the city to support all the individuals that live there.

Close to martial law. Authority is based on who has enough brawn to enforce their will. Adventurers are seen as mercenaries and given plenty of work.

Demons, corrupted humans, Genesplicers, old gods of chaos.