From publisher blurb:
Built deep in the Western Mountains, the mega-city called Octagon is a paradise for the idle rich and a living hell for the sweating masses. A chaotic mass of skyscrapers and mega-pyramids looms above the ruins of the old city, and terrible secrets lurk in the subterranean depths below. Octagon the place where elections and trials are run like reality shows, and corporate executives settle disputes through gladiatorial combat.
Octagon is a city full of both opportunity and danger. From the lawless streets of lowtown to the deceptively beautiful gardens of the penthouse level, adventure awaits those who are desperate or foolish enough to chase after it.
This PDF contains:
-History and general layout of the city
-Encounter groups for different areas
-Information on the most prominent factions in Octagon
A must have for all you Altered Earth fans.