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SandustryGuide

Build Artifact Puzzle in Sandustry

The Build room is the Artifact puzzle with yellow build squares and a limited Lava route. Your goal is to guide the Lava toward the support beneath the frozen material so the room can create a path to the Artifact.

Goal
Create the path
Need
Foundation
Main risk
Limited Lava

How much help do you want?

I want to solve it myself. Start with the smallest hint.

Jump to section

How to recognize the Build Artifact room

If you see yellow buildable tiles combined with a Lava-routing setup, you're in the Build Artifact room.

You're in the Build room if you see:

  • ✓Yellow build squares
  • ✓A limited Lava source
  • ✓Frozen material above Water
  • ✓Artifact behind the blocked route
Not your room? Open Artifact Puzzle Solver →

What is the Build puzzle goal?

You are not trying to carry Lava directly to the Artifact. The Lava is used to remove the support holding the frozen material. Once that material drops into the Water, the room creates the route you need.

  1. Lava

  2. Remove support

  3. Frozen material falls

  4. Water creates path

  5. Artifact reachable

How much help do you want?

I want to solve it myself. Start with the smallest hint.

Build Artifact solution

Full solution

6 steps

This reveals the complete answer.

What can break the Build puzzle?

Avoid these mistakes

  • ✕Letting Lava leave the route
  • ✕Blocking your own route
  • ✕Sending Lava away from the support

✓ Current behavior

Thermal Buffer

Thermal Buffers no longer consume Lava in Artifact rooms.

A save previously soft-locked by this old behavior should repair itself when loaded.

Think you broke the puzzle?

Build Artifact puzzle not working?

Choose the problem you are seeing.

Likely cause

The route is too open or the Foundation isn't guiding the flow toward the target.

Check

Next action

Simplify the route and test with a small flow.

Build puzzle recovery

If the route is wrong
Remove or simplify your Foundation setup.
If the Lava is still available
Rebuild the path and try again.
If an old save lost Lava to a Thermal Buffer
Reload the puzzle; the developer notes say this old soft-lock should self-heal on load.

How do you know the puzzle is solved?

You do not need to trigger a separate completion button. The practical success state is that the route to the Artifact is open.

  • ✓Support removed
  • ✓Frozen material dropped
  • ✓Path created
  • ✓Artifact reachable

After you collect the Artifact

The Artifact feeds into the broader Augment progression. If you're clearing every room, mark Build as completed and return to the Artifact Solver to find what's left.

Find my next Artifact →

Related Artifact puzzles

PachWater routing + two sensorsMoonpachMaterial control + 12 sensorsRocket BurnFrozen material + environmental routing

Common Build Artifact questions

General questions

What should I build on the yellow squares?+

Foundation is the recommended choice. Use it to shape the Lava route without consuming the limited puzzle material.

Why did my Lava disappear?+

Check whether Lava escaped or transformed before reaching the support. Thermal Buffers no longer consume Lava in Artifact rooms.

Can I restart the Build Artifact puzzle?+

If Lava is still available, rebuild the route. If an older save was soft-locked because a Thermal Buffer consumed it, reload the room so the built-in recovery can run.

Spoiler questions

SpoilerWhere should I send the Lava?+

Toward the support underneath the frozen material, not directly toward the Artifact.