There are 5 stages, and each dungeon stage consists of 5 depths (6 depths for Dwarven City). The dungeon stages are themed and contain different enemies once entered.
The Dungeon lies right beneath the City, its upper levels actually constitute the City's sewer system. Being nominally a part of the city, these levels are not that dangerous. No one will call it a safe place, but at least you won't need to deal with evil magic here.
Remember,[sic] that raising your strength is not the only way to access better equipment. You can go the other way, lowering its strength requirement with Scrolls of Upgrade.
Many years ago an underground prison was built here for the most dangerous criminals. At the time it seemed like a very clever idea, because this place indeed was very hard to escape. But soon dark miasma started to permeate from below, driving prisoners and guards insane. In the end the prison was abandoned, though some convicts were left locked up here.
The first Shop is on depth 6, so the player finally has a use for gold.
The caves, which stretch down under the abandoned prison, are sparcely populated. They lie too deep to be exploited by the City and they are too poor in minerals to interest the dwarves. In the past there was a trade outpost somewhere here on the route between these two states, but it has perished since the decline of Dwarven Metropolis. Only omnipresent gnolls and subterranean animals dwell here now.
Dwarven Metropolis was once the greatest of dwarven city-states. In its heyday the mechanized army of dwarves has successfully repelled the invasion of the old god and his demon army. But it is said, that the returning warriors have brought seeds of corruption with them, and that victory was the beginning of the end for the underground kingdom.
NOTICE: The Pixel-Mart will only appear if the player has completed the Ambitious Imp's quest before visiting this depth. This is because the Ambitious Imp acts as a shopkeeper on this depth. No enemies can spawn here.
In the past these levels were the outskirts of Metropolis. After the costly victory in the war with the old god dwarves were too weakened to clear them of remaining demons. Gradually demons have tightened their grip on this place and now it's called Demon Halls.
Very few adventurers have ever descended this far...
Don’t get too annoyed if you die in Depths 1-4, as these are only “heat-up” depths. Your only mission here is to find suitable armor, or weapon, and upgrade it as much as you can; as well as reaching Depth 5.
When enemies of a specific type are asleep (upon entering a depth, or via Scroll of Lullaby), and is kept from being awoken, additional spawning of that enemy type is significantly hindered, throughout your entire time spent at that depth (even after multiple visits to that depth). As long as they're not woken up, you will be able to breeze through the entire depth uninterrupted. The only time this isn't true is if that depth hasn't yet reached its 'Enemy Spawn Limit'.
Edit
Hello guys, I want to ask smth because I find it weird as nobody mentions the existence of depth 28-30. To put it simply, I found the amulet...