Source-checkedTechnology & automation

Underground Belts

by Andre Aquila · for Satisfactory

You could place as many "x" inputs for "1" output and vice versa.

171KDownloads
37d agoLast updated
>=502094Latest game version
ficsit.appSource

About Underground Belts

From ficsit.app

You could place as many "x" inputs for "1" output and vice versa.


<style> .multiplayer-banner { background-color: #4caf50; border-top: 4px solid #000; border-bottom: 4px solid #000; margin: 20px 0; padding: 10px 0; display: flex; align-items: center; justify-content: center; gap: 15px; width: 100%; } .multiplayer-text { color: #ffffff !important; font-weight: bold; text-transform: uppercase; letter-spacing: 2px; font-size: 1.1rem; text-shadow: 2px 2px 0px #000; } .multiplayer-sub { background: #000; color: #4caf50 !important; padding: 2px 10px; font-size: 0.8rem; font-weight: bold; text-transform: uppercase; border: 2px solid #fff; } .thumb-icon { font-size: 1.5rem; filter: drop-shadow(2px 2px 0px #000); } </style>

👍
Multiplayer Compatible
Everyone!

<style> .mod-container { --sf-gold: #fa9549; --sf-belt: #8b4513; --sf-bg: #2d2d2d; --sf-border: #000; max-width: 850px; margin: 20px auto; background-color: var(--sf-bg); color: #e0e0e0; padding: 30px; border: 4px solid var(--sf-border); box-shadow: 10px 10px 0px var(--sf-border); } .mod-container h1 { color: var(--sf-gold); text-transform: uppercase; text-align: center; border-bottom: 3px double var(--sf-gold); padding-bottom: 10px; margin-bottom: 25px; } .mod-container .feature-card { background: #1a1a1a; border-left: 4px solid var(--sf-belt); padding: 12px; margin-bottom: 10px; font-size: 0.85rem; } .mod-container h2 { color: var(--sf-belt); font-size: 1.2rem; border-left: 4px solid var(--sf-belt); padding-left: 10px; margin-top: 25px; } .mod-container .step-box { background: #252525; border: 1px solid #444; padding: 15px; margin: 10px 0; font-size: 0.85rem; } .mod-container .server-note { background: #3d2b1f; color: var(--sf-gold); padding: 5px 10px; font-size: 0.75rem; font-weight: bold; display: inline-block; margin-bottom: 5px; } .mod-container .gallery img { width: 100%; display: block; border: 4px solid #000; margin-bottom: 15px; } .multiplayer-banner { background-color: #4caf50; border-top: 4px solid #000; border-bottom: 4px solid #000; margin: 20px 0; padding: 10px 0; display: flex; align-items: center; justify-content: center; gap: 15px; width: 100%; } .multiplayer-text { color: #ffffff !important; font-weight: bold; text-transform: uppercase; letter-spacing: 2px; font-size: 1.1rem; text-shadow: 2px 2px 0px #000; } </style>

Underground Belts

Efficiently manage your item flow and declutter your factory floor with flexible underground logistics.

PS: The 3 old versions of the Underground Belt are still available to build.

How to Use (New Networks)

Standard Belt (1:1):
Place Input → Place Output (or vice versa). The link is created automatically.
Underground Splitter (1 Input to Many Outputs):
  1. Place all desired Outputs first.
  2. Place the single Input last.

Underground Merger (Many Inputs to 1 Output):
  1. Place all desired Inputs first.
  2. Place the single Output last.

Advanced Management

DEDICATED SERVERS: MAY NEED A RE-LOG
Adding to Existing Networks: Build an Input/Output, interact to make it Active, then interact again to select your group.
Renaming & Merging: Interact with any belt to write a new name. If the name exists, you can "Merge" groups via the button or dropdown menu.
Buffer Control: Change the Output Slot Max (up to 48 slots) to give all outputs in a group a larger internal buffer.
Visual Markers: Click "Show Markers" in the UI to see colorful spheres over all belts belonging to the same group.
Credits: Icons, UI, and Graphic advice from Deantendo: The UI guy!

Honest note: Underground logistics can be a lifesaver for clean factory builds. Enjoy the extra space!

Read the full description on ficsit.app →

Highlights

From source data

Game versions

Built for Satisfactory >=502094.

Footprint

Rated a light load on a server.

Dependencies

Needs 1 other project installed alongside it.

Underground Belts on Nxeon

From our catalogue
One-click install
Supported on Nxeon Satisfactory servers. We download it from ficsit.app, place it, and restart the server.
Server side
Required on the server
Server load
light
Smallest plan we suggest
Satisfactory — 8 GB (8 GB RAM). This follows our own load rating above, not a benchmark.
Latest build
3.0.33, released 2026-09-08

Recent builds

BuildReleasedGame versionsLoaders
3.0.332026-09-08>=502094n/a
3.0.9 alpha2023-11-16>=264901n/a

Run Underground Belts on a Satisfactory server

Pick a server or deploy a new one above; it is installed in one click.

What kind of mod it is

From the catalog
Listed on ficsit.app as “Mods”

Technology & automation

Machines, power, logistics and automation.

Runs on your server

From source side support

ficsit.app lists Underground Belts as required on the server. Check its ficsit.app page to see whether players need it too.

Compatibility

Game
Satisfactory
Runs on
Serverrequired on the server
Game versions
>=502094
Requires
1 other project installed alongside it.

Verified at the source

  • ✓ficsit.appOfficial listing, checked 2026-10-15Open ↗
  • ✓AuthorAndre Aquila, as published on ficsit.app
  • ✓LicenseNot published by the sourceFree

Underground Belts, answered

Generated from the mod’s own source data.

Do my players need to install Underground Belts?

ficsit.app lists Underground Belts as required on the server. Check its ficsit.app page to see whether players need it too.

Is it free?

Yes. Underground Belts is free to download from ficsit.app.

How do I add it to my Nxeon server?

Use “Add to a server” on this page, or open NxLabs from your dashboard. We install it, restart your server and switch it on.

NxLabs

Run Underground Belts on a Satisfactory server.

Deploy in about a minute from $12.00 a month, then add Underground Belts in one click.