Blame! RPG

autonomous, colossal machines responsible for constructing and expanding the vast, planet-sized City, but their programming degraded after humanity lost control of them. Without clear direction, most Builders now construct bizarre and pointless structures, contributing to the City's chaotic expansion.

A type of Safeguard unit, a silicon-based humanoid robot designed to kill any humans without the Net Terminal Gene. They appear as black and white, androgynous, humanoid machines with elongated, claw-like hands, and are known for swarming targets and using powerful melee attacks. While weaker versions use primitive weapons, stronger, higher-level Exterminators possess formidable exoskeletons, can perform beam attacks, and even exhibit abilities like telekinesis.

The "Governing Agency", also known as the Authorities or Controllers, a governing body from the Netsphere that lost control of the City. Their goal was to secure control by finding a human with Net Terminal Genes to stop the Megastructure's chaotic growth and regain order.

Humanity's survival depends on a biological marker called the Net Terminal Gene. This gene is the key to accessing the Netsphere, the network that controls the City.

Humans are not a monolithic group but are scattered survivors in the vast Megastructure. Due to millennia of isolation, they have evolved into distinct "breeds" with wildly different physical characteristics, cultures, and levels of cybernetic modification. Scattered in small, isolated tribes across the chaotic mega-city, they live under constant threat from the Safeguard and Silicon Life. The humans have lost the ability to control the city's automated systems, making them "illegal residents" in their own home.

A transhumanist race of cyborgs, originally humans, who have extensivly augmented their bodies with cybernetics and have silicon-based genomes. They are a nomadic warrior culture that seems to maintain the "City's" chaotic state to ensure the their continued survival. they seek to gain control of the Netsphere for their own survival which leads to frequent clashes with the Safeguard and Exterminators

An automated defense system that has malfunctioned and now views all humans without the Net Terminal Gene as "illegal residents". They are relentless cyborgs and robots that hunt and kill any without the Net Terminal Gene. they will typically send Exterminators or if need be, autonomous agents that can pass as human.

The virtual reality network that was once used to control the City's growth. Accessing it is the only way to halt the destructive expansion, but the technology requires the rare and almost extinct Net Terminal Gene.

A massive, sprawling, and endlessly growing physical framework of the City that spans and occupies what was once the entire solar system. It is a near-infinite collection of buildings, scaffolding, and tunnels, built by automated "Builders" that are no longer under human command. Travel between its layers is dangerous and slow, sometimes involving high-speed elevators.