From publisher blurb:
The majority of The Ruin At The End Of The World concerns the Factions of The Necropolis
A summary of the factions that currently exist in the Necropolis. The communities described in this section include the Androids, Broken Ones, Cartel, Foundationists, Ghouls, Hive, Purist Enclave, Raiders, and Serpent Gods. Each entry gives a brief overview (more information can be found by reading the 200+ adventure locations), a summary of each faction's general attitude, and where the faction's forces are typically to be found.
Generic Stat Blocks
A large number of stat blocks for creatures and NPCs encountered in the Necropolis, from soldiers of the Broken Ones empire to xeno scouts of the Purist Enclave.
Survivors in The Necropolis
Guidelines for making characters from the Necropolis, including a new system for determining starting equipment for characters who are more like "survivors" than "adventurers".
New Advanced Classes
The Ruin At The End Of The World presents three new advanced classes, the Ghost Raider, the Raging Claw, and the Xeno Scout.