Prison Depths

The Prison Depths is short, optional biome between the second and the third level.

It's accessed through the Promenade of the Condemned or the Dilapidated Arboretum using the Spider rune and leads to the Ossuary, the Morass of the Banished or the Ancient Sewers (1+ BSC).

Access and exit
The Spider Rune is required to access this area through the Promenade of the Condemned or the Dilapidated Arboretum. An underground section only accessible by wall climbing in both levels leads to the Prison Depths.

There are three exits out of Prison Depths. The player will always have the choice between the Ossuary and the Morass of the Banished on all Boss Cells. With at least 1 BSC active, a third door (always close to the other exits) will lead to the Ancient Sewers.

Iron cells
Two locked doors are found at the end of the biome, next to the exit doors to either Ossuary, Morass of the Banished, or Ancient Sewers (at 1+ BSC). Behind both these doors there is a 2-item choice altar. If the player finds the Iron Cells key, which randomly drops from an enemy, they can choose to open one door and take/recycle an item inside.

Scrolls
The Prison Depths contains only one Power Scroll, obtained through the cursed chest at the start of the level.

Enemy tier and gear level scaling
In the table below, you will find the gear level and enemy tier of Prison Depths based on difficulty.

Boss Stem Cells rewards

 * 1 BSC: Exit to the Ancient Sewers

Chests and loot

 * There is always a cursed chest at the beginning of the biome, right before the one-way door.

Shops

 * There is always a weapon/skill shop around the halfway point of the level.

Exclusive blueprints
The blueprint for the War Spear and the Oil Grenade are exclusively found in Prison Depths as they are looted from Hammers.

Enemies
In the Prison Depths, you will find many dangerous enemies, such as Slashers and Lacerators. In addition, Maskers and Hammers could be considered the iconic enemies of this biome, with the latter never spawning in any other location than Prison Depths. On high difficulties, Knife Throwers and Rampagers appear, making this level even harder to navigate.

In the table below, you will find which enemies are present in the Prison Depths depending on difficulty level. For each enemy, any common, uncommon, rare or legendary blueprints they carry are indicated. When applicable, the minimum difficulty level for blueprint acquisition is specified in brackets.

Trivia

 * Prison Depths is the only biome to contain two distinct soundtracks, namely "Prison Depths" and "Prison Theme". While "Prison Depths" was made exclusively for this biome, "Prison Theme" would have been for another biome called Prison Hub, but it was scrapped during the alpha stage of the game.