Gravel Lands Guide — Layer 1 Survival Basics

What is Gravel Lands in Casualties: Unknown?

Gravel Lands is layer 1 of the eleven-layer descent described on the official Steam store page. It is the opening leg of the cargo-retrieval run: a survival-sim cave trip where injuries, crafting, and mood all feed the same health systems you will rely on for the rest of the planet. For where this layer sits in the full stack, see how many layers and the follow-on guide for Deeper Gravel Lands.

Official trailer frame; it is not labeled with a layer name, so it shows the game’s mood, not a confirmed Gravel Lands location.

Community references checked on 2026-11-10 describe Gravel Lands as cavernous, cold, and built from small interconnected caves rather than one open chamber. That matches the broader Steam pitch—each layer brings its own challenges—without naming every tile type on the store page itself.

What environment, threats, and resources should you expect?

Official copy stresses hostile environments, loot left by prior expeditions, and tools for efficient travel. Community-reported layer data adds a more concrete picture for layer 1:

Treat plant and enemy names as labels you may see in the UI, not as guarantees every seed spawns them. Prior expeditions leaving loot behind is an official theme—helpful items can still kill you if you grab them bleeding.

Another unlabeled trailer frame, used only to illustrate flashlight-lit cave exploration in general.

Hunger and mood pressure show up in official survival language: the store page notes that doom and gloom can make life harder, and simulated injury is unavoidable. A dark cave with limited food is exactly when those systems stack, so food planning belongs in the same conversation as bandages.

What medical and crafting prep fits layer 1?

The Steam feature list is explicit: an entirely simulated cardiovascular and limb damage system, bandaging, fighting infected wounds, stabilizing blood loss, and flora that can help patch you up alongside robust crafting. For triage order and UI habits, start with the medical guide, then drill bleeding and infection before you memorize layer trivia.

Priority packing mindset for Gravel Lands (not a loot checklist):

1. Bleeding kit first — Dressings and a way to craft sterile supplies matter more than extra weapons. Official trailer-era UI shows bandaging as a drag-around-limb minigame; exact item IDs remain community-reported.
2. Light and navigation — Community notes mention natural backlighting in layer 1 that disappears deeper in Deeper Gravel Lands. A crafted headlamp appears in demo-era recipe footage; confirm ingredients in your build via crafting recipes.
3. Infection awareness — Any spike trap or crawler fight that breaks skin can escalate later. Do not skip disinfection because layer 1 “felt easy.”
4. Food and rest planning — Official screenshots show hunger prompts in dark caverns. Carry edible salvage when community spawn tables are uncertain.

If you are learning controls and inventory at the same time, pair this page with the beginner guide so medical failures are not your first tutorial.

What should you prioritize before leaving layer 1?

Use this decision order before you hit the layer bottom prompt:

1. Stabilize health — No open bleeding, no active fibrillation warnings on the vitals monitor, and no spreading infection you are ignoring. See fibrillation if the ECG looks unstable.
2. Secure light and rope access — Community-reported data positions Gravel Lands as the last layer with easy background lighting. Stock light sources before Deeper Gravel Lands.
3. Craft baseline tools — The store page ties survival to tools and crafting. At minimum, aim for sustainable bandaging and a digging/light tool path per your character build.
4. Bank knowledge, not greed — Official text warns that helpful things can still be your death. Exiting to save with stable vitals is valid; the continue prompt at the layer end is community-reported.

Adjustable loot and danger sliders live on the main menu per the Steam feature list. Layer 1 is a reasonable place to learn those knobs before you commit to a harsh full run.

How do you transition to Deeper Gravel Lands?

At the bottom of layer 1, community layer documentation states you choose Save and exit or Continue into the next layer, temporarily restricting jump during the transition. That flow is community-reported; if your build differs, trust your UI over this wiki.

The next layer name is Deeper Gravel Lands (layer 2). That page picks up the same gravel biome family with added darkness and flooding in community notes—read it before you commit consumables you cannot replace.

For console tuning or practice runs, see console commands. For run length expectations, the demo stops after five layers while the full game lists eleven on Steam.

Sources checked

• https://store.steampowered.com/app/4576490/Casualties_Unknown/ (eleven layers, survival/medical/crafting features, demo exists)
• https://store.steampowered.com/app/4576510/Casualties_Unknown_Demo/ (demo scope — first five layers, community-aligned)
• https://casualtiesunknown.miraheze.org/wiki/Layers (layer 1 environment, threats, flora, temperature — community-reported detail)

Last checked 2026-11-10 against the sources above, game version 1.0.

Screenshots and trailer frames: official Steam store page and trailers, © Orsoniks / Oro Interactive.