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How to Upload Your Own World to Your Space Engineers Server

4 min read·Updated Nov 10, 2026

Learn how to bring your own saved world onto your Space Engineers server using the Files page and Worlds & Backups tab, so you can keep playing your build with friends.

Already have a Space Engineers world you love, maybe one you built in single-player? You can move it onto your RiverHosting server and play it with your friends. The panel does not have an upload button for worlds, but the process is simple: you put your world archive in the right folder with the Files page, then restore it from the Worlds & Backups tab.

Before you start

  • Have your world packed into a single .zip archive on your computer.
  • Start your server at least once so it creates its own world. The panel needs that first world to exist.
  • Know that restoring a world replaces the world your server is using right now. We will make a safety backup first.
  • Large worlds can be several gigabytes. Make sure your server has enough free disk space for the archive and for the restored world. You can watch your Disk Space chart on the Console page.
Restoring replaces your current world

Restoring a world swaps out the active world on your server. There is no undo, so always use Back Up Now first if you want to keep the world that is on the server today.

1. Stop the server and back up the current world

Restoring works best while the server is off. Taking a backup first means you can always go back to the old world.

  1. Click Console in the left-hand menu.
    Console in the server menu
  2. Click Stop and wait until the status badge at the top of the page shows OFFLINE.
  3. In the GAME section of the left-hand menu, click Space Engineers, then the Worlds & Backups tab at the top of the page.
    Space Engineers in the GAME section of the menu, then the Worlds & Backups tab
  4. In the World Backups card, click Back Up Now. A new backup of your current world appears in the list.
Keep disk space in mind

Every backup is a full copy of the world on your server's disk. Once you are happy with your new world, delete old backups you no longer need.

2. Upload your world archive with the Files page

Your archive needs to go into the folder where the panel keeps world backups.

  1. Click Files in the left-hand menu.
    Files in the server menu
  2. Open the config folder, then open the WorldBackups folder.
  3. Click Upload and choose your .zip file, or drag and drop it into the folder.
  4. Wait for the upload to finish. Large worlds can take a while, so keep the page open until it is done.

3. Restore your uploaded world

Now you tell the panel to use your uploaded archive as the active world.

  1. In the GAME section of the left-hand menu, click Space Engineers, then the Worlds & Backups tab at the top of the page.
  2. Find your uploaded archive in the World Backups list. If it is not there yet, reload the page.
  3. Click the Restore button on that row (its tooltip says "Restore / switch to this world") and confirm.
  4. Wait for the message "World restored. Start the server to load it."
  5. Go back to Console in the left-hand menu and click Start.
The first start is slow

The first start can take a couple of minutes, and the console stays quiet for a while. That is normal. When you see "Session loaded" followed by "Game ready", your world is up.

Switching between worlds

Your server always uses the world in the folder named World. To switch to another saved world later, restore that world's backup the same way. There is no separate list of live worlds.

4. Check your settings after the world loads

A world made elsewhere may rely on features that depend on your server settings. Check these two things:

  • Crossplay: Open the Crossplay tab. With crossplay on, mods come from Mod.io only and worlds are limited to 3 planets. A world with more planets than that may not load correctly. With crossplay off, your server uses the Steam Workshop and only PC (Steam) players can join.
  • Mods: Open the Mods tab and review the Mod Load Order list. If your world used mods, make sure they are listed and that none are tagged "wrong source". Turn on Experimental Mode on the Server Config tab if you use mods.
Do not rename the world folder

The world folder must stay named World. Changing the World Name startup value stops the server from starting.

Troubleshooting

  • The archive does not show in World Backups: Check that the file is inside config/WorldBackups and that the upload finished, then reload the Worlds & Backups tab.
  • The restore fails or the server will not start afterwards: Open the Worlds & Backups tab and restore the safety backup you made in section 1 to get your old world back, then check the Console for errors.
  • Mods are missing or will not load: Open the Mods tab and click Show log in the Workshop Log card to see which mod failed. Also check that your crossplay setting matches the mod source your world needs.
  • Players cannot join with crossplay on: Your world may have more than 3 planets. Turn crossplay off on the Crossplay tab and restart.
  • The console is quiet after starting: The first start takes a couple of minutes. Wait for "Session loaded" and "Game ready" before trying to join.

Need help?

If your world will not restore or load, the RiverHosting support team can take a look. Visit https://riverhosting.com/support and tell us what happened and what the console shows.

Include the details

Let us know the name of your archive and the last lines of your Console. It helps us fix the problem faster.

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