DustFall Terrain — Fires, Powder Caches and Cave-Ins

DustFall terrain is not decoration. The store page calls the underground fully destructible, simulated pixel terrain, and then spends a full section explaining what that means: the pixels flow, burn, explode and collapse, and the player is expected to weaponize all four behaviours rather than shoot around them.

That design choice is why the game reads as a demolition sandbox and a shooter at the same time. Alien life has overrun the surface, so the terrain below is the only resource you have, and the same act of destruction that opens your escape route can also bury you.

Fully Destructible Pixel Terrain

The official line is that the underground is made of pixels that flow, burn, explode and collapse. The feature list states it again as fully destructible, simulated pixel terrain, which puts simulation ahead of any fixed tile map: terrain is a material with behaviour, not a wall with hit points.

Terrain interaction	What the store page says it does
Oil and fire	Ignite oil and let fire spread through the terrain
Powder caches	Detonate them to blast a route through solid rock
Supports	Remove crucial supports and bring a collapse down on enemies
Tunnels and cavities	Every tunnel carved and cavity blasted changes the battle and your escape route
Per-layer materials	Each of the six layers has its own terrain materials and environmental reactions

Because the reactions are per-layer, the terrain you learn in the first ruin is a starting vocabulary rather than a fixed rulebook. The store page is explicit that the six layers differ in materials and environmental reactions, which is why a route that is trivial in one layer can be unavailable in the next.

Fire, Powder and Collapse

The three documented reactions divide cleanly by purpose. Fire is area denial, because you ignite oil and let it spread, so the terrain itself becomes a hazard that grows on its own. Powder is excavation, because detonating a cache blasts a route through solid rock, which is the tool for material that ordinary digging cannot handle. Collapse is a trap, because removing crucial supports brings a mass of terrain down on whatever is underneath, and enemies count as whatever is underneath.

The warning that comes with all three is the same sentence. Every act of destruction may open a path to survival, or bring an entire ruin down on top of you, so none of these tools is free. Fire you set is fire that spreads toward you as well as away from you, and a collapse you trigger is a collapse you are standing near.

Why Terrain Control Is a Weapon

The store page frames the whole system under the heading THE TERRAIN IS YOUR WEAPON, and the sentence that follows explains the tactical claim: every tunnel you carve and every cavity you blast open changes the battle and your escape route. In practice that merges two resources most shooters keep separate, because map control and firepower become the same action.

For a new player the practical reading is that the level is a consumable. You are not clearing a room and moving on; you are choosing which parts of the ruin to remove and which to keep as cover, and the payloads page covers which tools apply to which material. The terrain is also the reason depth is safety, since the same digging that opens a route downward is what takes you away from the surface scan described on the hunters page.

What Is Not Documented

The store page does not name the individual terrain materials, does not quantify how fast fire spreads or how much rock a powder cache removes, and does not state which layer contains which reaction. Whether oil, powder and support structures appear in every ruin or only in some is also unstated, and no official source publishes destruction numbers for any of them. Those details are not documented yet.