Warhammer 40,000 universe is not too weak heart. With various Xeno armies and the heretical forces in chaos that fight against empire for controlling the galactic expansion, there are not many safe places to serve their lives in the long future.
However, some of the planets in the 42nd millennium are more deadly than others. Countless people die every day as fuel in one way or another for the lifestyle of empire. Whether it is life they know of it, natural dangers or the ever-present threat of war on the horizon, these are by far the deadliest planets in Warhammer 40K universe.
Spoilers follow for different books, games and other 40k media.
Catakan
A death world truly
Catachan is a planet used as a setting of different books and other lore and is marketed as deadly on purpose. You know, in a universe like 40k, when something is classified as a death world, that it is much worse than you could ever imagine. Catachan is one of these death worlds, known as such because every aspect of life there is deadly to humans.
The weather, geography, flora and even fauna are all more than capable and happy to kill everything that comes too close. The good news is that those who survive the hostile nature on the planet are some of the toughest citizens of empire, especially those who join their guard unit, Catachan Jungle Fighters.
Nekromunda
Hives as far as the eye can see
Necromunda is a planet that has served as a setting of many board games, book and now some video games. It is a hive plane that has made itself known during the Lore years to be particularly horrible. Cities mile high and exciting continents are the only real bastion for humanity outside or irradiated dust increases.
Inside these cities, the rich live in abundance in the highest towers, but the everyday citizen of Necromunda is about gangs, tyrannical police and rulers and the ever -present threat of mutation and chaos. There is also the unfortunate understanding that the factory work that is common in these cities as the forms of employment will probably leave you.
Terra
There it all started
A controversial statement, but the sacred planet Terra (earth) is far from the cradle of humanity as it once was. Sea cooked dry, the mountains planned, the entire planet is now a large hive city.
Although it is easily the most protected planet in empire, death is not far away for any citizen in Terra. Other people's spread and crusher mean that resources are limited, the disease is common and damage to the workplace is also. Not to mention, there is a gigantic goal at Terra all the time from all armies that are contrary to empire, which includes them all.
Armageddon
Orks, tyranids, chaos,
Armageddon has gone through Wringer much more than once. It is hosted to one of the deadliest and most stoic of the imperial guard regiments, Armageddon Steel Legion, but it is easy to see how someone who grows up there would have to be hard.
There are beehive towns and radiation plains that in some other planets on this list, but the actual presentation is the constant war. The planet has seen an invasion of Tyranids, an energy Waaagh and a chaos invasion, some at the same time. There are several wars for Armageddon on the timeline, and they don't seem to end soon.
Crown
Grip on war
The planet that is the attitude for The Dawn of War Games, Kronus has seen everything. It is not very uncommon for a particularly important planet in the galaxy to be questioned by several fractions in 40K, but Kronus takes it to a whole new level.
The planet is held by empire of the mysterious Blood Ravens chapter in Space Marines and various human forces. They have fought a war against fires, energy, Word Bears and T'AU. It is later revealed that it is also a Nekron grave world. If there was ever a planet to avoid, this is quite up.
Ice -stan III
Treason
Many planets in the 40K universe have long and coarse times. Not everyone has made it the “current” timeline. Istvan III was a completely normal-island world in the 30K time line and played an important part of the events in Horus Heresy.
It was the Istvan system where Horus and the first of the traitor's legions attacked their brothers in mass. This abuse was partly carried out by various virus bombs that were dropped on the planet's surface. The results make it impossible for something biological to survive on the planet at all.
Fenris
Long in the tooth
Space Wolves Home Wolves Legion of Space Marines, Fenris is at least partly why this chapter is so terrible. The temperature on this Arctic plane is well below hospitable, and the trunks that live there do so with only the basic amount of resources, often choose to raid other neighbors for survival.
This includes the giant wolves that chase the country and the craze that calls the seas and lakes their home. After Heresy, it has become a goal for the thousand sons, eager to adopt revenge for their own planet being planned.
Cadia
Cadia stands?
Cadia is a planet in a rather dangerous position – and one that met a unclear end. While it was still a planet, Cadia was on the edge of the eye of terror, the place where the warp enters real space. It was revealed that the planet and its inhabitants were more resistant to warpenergies, which made them a kind of Bulwark against chaos. It is a rough place to be in, regardless of the new timeline.
While many had tried, Abaddon finally cracked the planet and opened the eye further. Asteroids are still where the survivors have set up training places and try to keep their own, but it is not empire's pride and joy that it once was. At least the planet broke before the guard did.
