Hive World

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When there is no more room to go out, you go up.

The Imperium's pet name for its Arcologies, cities on the scale of mountains. Once a world gets one, it ends up building more until it is more-or-less covered in hives, and we call the resultant mass of metal and humanity a Hive World. If you're not in one of the towers at the top, they're generally very shitty places to live, what with the gang-infested wretched hives of scum and villainy, starvation, hobos due to lack of resources, forcible conscription for the Imperial Guard, and the occasional mutant tribes in the Underhive sewers, and such. The only reason the Imperium keeps them around is because they make great recruiting grounds for the Guard and the Adeptus Astartes. Yes, you read that right. A Hive World is on par with Feral and Death Worlds for recruiting Space Marines.

You know that intro blurb? "To be a man in such times is to be one amongst untold billions. It is to live in the cruelest and most bloody regime imaginable." Yeah, that's life on a Hive World. Grimdark to the max.

The moral of the story is that organized urban planning initiatives should NOT be taken lightly.

Hives tend to get old, worn with constant reconstruction, and eventually very confusing. As time goes on the lower levels invariably start to cave in on themselves due to the ever increasing weight from above and the decay that sets in on ill-used regions. This causes the phenomenon of the 'underhive', a mess of forgotten and collapsing old tunnels and buildings where gangs, mutants, freaky life forms of all sorts and pollution tend to collect. In worse and older hives the underhive can be lethally toxic, radioactive, and house everything from mutant gangs with pet giant death-roaches to malfunctioning servitors armed with power scourges to even the occasional Genestealer. Needless to say these are wonderful places to visit if you happen to be looking for a quick death, but for rogue psykers and other people with no choice but down they are generally home for however long their lives last.

Aside from all the other dangers, there are also hivequakes, which is what happens when part of the lower levels settles or breaks down further and things above it are affected. This can be localized, widespread, or even catastrophic if the piece that finally gives out was bracing things that were holding up chains of supports that lead to collapses much further above. They can also lead to invasions of mutants and renegades, especially if the quake opens up a sizable rift into the heart of the hive where the underhivers can loot valuables and necessities.

As a very loose upside, the underhive functions as a flush-valve for the dregs of society, a clear area to keep an eye on and fortify against, and something to focus the masses on hating rather than letting them hate upwards. On the further downside it's a breeding ground for dangerous beasts, insane cultists (sometimes of the Genestealer variety), psykers, gangs, plagues, and worse, and getting down there to repair anything is a daunting if not impossible task for anything less well equipped than an entire arbites unit complete with armor support...... and in older hives, it might even be utterly impossible for anything shy of a kitted out inquisitorial strike team or squadron of space marines! Thus in many hives hivequakes are as common as weather pattern shifts and contribute to the sense of paranoia that already comes with living in an overpopulated spire stuffed with billions of religiously hateful, often violent, or outright criminal people only barely controlled by watchful and well armed police forces.... if that much. And you thought your neighborhood was bad!

As mentioned above, those who can live in hives are good at navigating crowds, familiar with a certain level of tech, and often very alert, all traits that make them good soldiers, inquisitorial fodder, or marine potentials (depending on their individual aptitudes). Hives also concentrate humanity into one location and provide them with tools and space to work, meaning massive amounts of labor gets done in a hive by a never ending tide of workers, so production is essentially nonstop.

See Also

• Armageddon, a Hive World and site of three wars.
• Cthonia, a Hive World and homeworld of the Luna Wolves/Sons of Horus (subjected to Exterminatus after the Horus Heresy).
• Necromunda, a Hive World and the setting of the tactical skirmish game of the same name.
• Nostramo, a Hive World that served as the homeworld of the Night Lords (subjected to Exterminatus by Konrad Curze).
• Terra, the Hive World to end all Hive Worlds, as humanity was born there.
• Zayth, a Hive world with a massive super continent that is bombarded with war, that instead of well placed trenches and fortifications like on Krieg, the city moves...
• Forge World, another sort of world, dominated by manufacturing and research rather than residential construction.