---
title: Casualties Unknown Layers, Run Settings, Enemies and Traps
description: All 11 layers, difficulty presets and modifiers, and every enemy and trap seen so far.
url: https://casualtieswiki.wiki/layers/
---

Layers

# Casualties Unknown layer guides
A run is a descent through ten main layers and a short eleventh. Find out what waits on each one, how to set the difficulty you want, and which traps and creatures to take seriously.

## Where to start
Know what is coming before you reach the bottom of a layer.

- [All layers](https://casualtieswiki.wiki/layers/all-layers/)10 main layers plus a short 11th

- [Enemies and traps](https://casualtieswiki.wiki/layers/enemies-and-traps/)Keep a wall between you and enemies

- [Run settings](https://casualtieswiki.wiki/layers/run-settings-and-modifiers/)Paradise and Relaxed are gentler

## Every Casualties Unknown layer guide

- [list All layers How many layers there are, what is on each of the first five, and how to move between them. 10 main layers plus a short 11th The demo has 5 Radiation forces you onward](https://casualtieswiki.wiki/layers/all-layers/)

- [guide Run settings Difficulty presets, custom run settings, layer modifiers and playing unchipped. Paradise and Relaxed are gentler Desolate is brutally cold Modifiers change a whole layer](https://casualtieswiki.wiki/layers/run-settings-and-modifiers/)

- [list Enemies and traps Every enemy and trap seen so far, how dangerous each is and how to disarm or avoid it. Keep a wall between you and enemies Throw junk onto spike traps 5 seconds to dodge a sound cannon](https://casualtieswiki.wiki/layers/enemies-and-traps/)

## Layers questions players ask
How many layers are in Casualties Unknown? Ten main layers, a shorter 11th layer and an optional bonus ending. The demo has the first five. [Details →](https://casualtieswiki.wiki/layers/all-layers/)

What is the radiation line? A rising band of radiation that forces you to keep descending. [Details →](https://casualtieswiki.wiki/layers/all-layers/)

How do you survive a sound cannon? Get behind solid cover within about five seconds of it charging. Being underwater makes the damage far worse. [Details →](https://casualtieswiki.wiki/layers/enemies-and-traps/#sound-cannons)

What difficulty should you pick? A gentle preset like Paradise or Relaxed for a first run, then Normal once you reliably reach layer 3. [Details →](https://casualtieswiki.wiki/layers/run-settings-and-modifiers/)

What are layer modifiers? Random conditions applied when a layer generates, such as Ionized or Infested. [Details →](https://casualtieswiki.wiki/layers/run-settings-and-modifiers/)

What is a drill pod? A machine that digs through terrain. The full game adds more of them, and breaking one yields scrap and circuits. [Details →](https://casualtieswiki.wiki/layers/all-layers/#drill-pods)

What is the sense of impending doom? A moodle warning that an elder thornback is hunting you. It also spikes your blood pressure. [Details →](https://casualtieswiki.wiki/layers/enemies-and-traps/)

Other sections: [Survival](https://casualtieswiki.wiki/survival/) · [Health](https://casualtieswiki.wiki/health/) · [Items](https://casualtieswiki.wiki/items/) · [Mods](https://casualtieswiki.wiki/mods/) · [Characters](https://casualtieswiki.wiki/characters/) · [Game info](https://casualtieswiki.wiki/game/) · [Updates](https://casualtieswiki.wiki/update/)