Sandustry Mods: Current Fluxloader Setup and Demo Warning

For current Sandustry mods, use the maintained Fluxloader project and its latest compatible release. Do not use the old 2025 instructions that place modloader.exe inside a SandustryDemo folder; those steps target the pre-Early Access Demo.

Before installing anything

Back up saves and any existing mod configuration. Sandustry is in Early Access, and the collected sources do not confirm that every community mod works with every game update, storefront build, or operating system.

Use releases and mods from sources you trust. Read each mod's version and dependency notes before starting the game.

Install the current Fluxloader

1. Open the Fluxloader releases page.
2. Choose the asset that matches your operating system and CPU architecture.
3. Download and run the current release.
4. Let Fluxloader create its files beside the loader binary.
5. If it cannot find Sandustry, open fluxloader-config.json and set gamePath to the game executable.
6. Add compatible mods to the generated mods folder, following each mod's instructions.

Fluxloader's current documentation says it generates:

• fluxloader-latest.log
• fluxloader-config.json
• a mods folder

The checked 2.5.5 release offered builds for Windows x64 and ARM64, macOS x64 and ARM64, and Linux x86_64 and ARM64. That release number is a dated snapshot, not a permanent recommendation; use a newer compatible release when the project publishes one.

If Fluxloader cannot find the game

Use the generated configuration rather than moving the loader into an old Demo directory. Set gamePath to the current Sandustry executable, then run the loader again.

The collected sources do not yet verify the exact executable path for every Steam, GOG, Demo, and Xbox PC installation. Copy the path from your own current installation instead of pasting an outdated example.

Finding mods and dependencies

The Fluxloader website lists community mods and maps. Check:

• the supported Sandustry version;
• required dependencies;
• operating-system limits;
• whether the item targets the Demo or paid Early Access build;
• recent issue reports or release notes.

A listing on the site is not proof that a mod is compatible with the latest game patch. Add mods one at a time so you can identify which change caused a startup or save problem.

Avoid the old Demo method

An older video tutorial installed modloader.exe into a folder named SandustryDemo and used a Discord-provided Custom Map Loader. That method is useful only as historical context.

It should not be the default for the paid Early Access game because the current project uses downloadable Fluxloader releases, a generated config, and a generated mods folder. If an old guide mentions only the Demo directory, treat it as version-specific and outdated.

Basic troubleshooting

• Read fluxloader-latest.log after a failed launch.
• Recheck gamePath in fluxloader-config.json.
• Remove the newest mod temporarily and retry.
• Verify every dependency and supported game version.
• Restore the backup if a save or configuration becomes unusable.
• Check the current Fluxloader release notes before reporting a loader issue.

Sources

• Fluxloader website
• Fluxloader GitHub repository
• Fluxloader 2.5.5 release snapshot
• Historical Demo mod tutorial — YouTube
• Sandustry on GOG

Fluxloader setup and release assets were checked on August 16, 2026. Test the current loader and each mod against your exact Sandustry build before relying on them.