Immodum is not really hell, but a kind of it. Lord Aspects analogue for hell is Realm of Bloodshadow. However, Immodum is far worse.
It is really disturbing place, especially, when most of it's rooms has weird noises playing all the time, causing disquietude.
Nothing else is known about Immodum's history.
Immodum consists of 3 main layers: Outer, Medium and Inner. All of them are filled with darkness, that has to be chased with a source of light, for you to see at least something. All the following info is based on Jonathan's journey across it. Jonathan stopped his journey at the end of second area. He couldn't go further. Also, there are some special areas that is specially protected. All the info of areas after second one are based on Igoryan's journey.
Outer Layer (Difficulty = 2/10)
Outer Layer is pretty much easy to pass. Noone agressive is here, so you won't meet any enemies. The only here's inhabitants are Shadow Spiders, a huge insects, appoximately 1,5 meters in lenght. Despite they are scary, they cause no problems, if you won't touch/attack them.
Outer Layer begins from The Entrance, a 2,5x2,5x2,5 m cubical room, with two doors, first one is the entrance to Immodum, second one leads to next room of this realm.
Most of following rooms in Outer Layer are pretty easy, simple corridors, rooms, sometimes having puzzles. Example puzzle is: find a key, open the correct door, find a key behind it, use it to open the door to the next room. Pretty much simple puzzles, if you are smart enough. Pretty much disturbing room is the Cobweb Room, with above mentioned spiders. Worst room of the Outer Layer is the caverns, with tight spaces, where you can easily get stuck.
The Outer Layer ends with a circular room, having the radius of 20 000 m. It has 2 doors: first one is leading to previous room, second one is leading to the next room. They are both at the sides of this huge circle, so you will have to travel. Only two doors, gray walls, stony celling and floor are in this room. The thing that fills this huge space, is Immodum Mist, black mist that blocks light's way. Even if you will have the source of light, you will not be able to see anything further than 5 meters. Once you will find the second door, you will get to the medium layer.
Medium Layer (Difficulty = 4/10)
It meets you with the same rooms, but with advanced puzzles and enemies. Be quiet here, i think that you certainly do not want to atract attention of any monsters here.
Then, you are entering the only zone that has no sound, The Silence. Absolutely no sound can be heard in this maze. This room is a 5 km x 5 km maze. It would be better if you pass this maze quickier than 45 minutes. Because 45 minutes is exact time needed to drive human mad, by the abscence of the sound.
Then, you will enter a huge (1000 km x 1000 km) section, covered by mountains. For first, relief is flat, but then, you are getting trapped between two mountains. 10 km from the start and you are trapped between 2 sheer walls at the distance of 1 meter from each other, with dozens of kilometers of falling down. Jonathan stopped his journey here.
Inner Layer (Difficulty = 6/10)
It is much more complicated than the medium layer. This area is splited to 2 parts. The first part is Warrior Area. When you enter there, you must fight Warrior Of Immodum's. There are Rocubits, Ghosts, Demons. This area is huge
The Destructive Layer (Difficulty = 15/10)
There are some very very advanced beings that can destroy a normal civilization in just 1 nanoseconds. They spread chaos everywhere.
The Throne Room (Difficulty = ???/10)
This is the home for Ктесть, his daughter and the strongest creatures of darkness. This place is simply hypothetical.
There are weird things inhabiting this place. They can be separated into neutral and agressive.
They are looking pretty much like black tarantulas, but bigger (1,5 meter lenght). They will not attack or even notice you, unless, you will cause them to.
Eye is chasing you across some of the rooms. It is flying right behind you at the distance of 1-5 meters (depends on the room type). If you will hurt it, it will attack you mentally, which can lead to losing the counciousness.
Warrior of Immodum
They are huge creators that defends Immodum from anything. An average warrior weights about 3812500 tons and it's height is about 100 meters.