Install the Space Engineers Dedicated Server, add each mod in the server manager with its Steam Workshop or Mod.io ID, save the world, and verify the list under World Settings > Mods. Steam Workshop IDs are for Steam PC servers; Xbox and mixed PC/Xbox servers should use Mod.io-hosted mods instead. If a Workshop download fails, the server’s workshop_log.txt identifies the final error, while updating Steam DLLs or resetting the appworkshop_244850.acf manifest are the official recovery steps.
What do you need before installing Space Engineers mods?
You need a Windows installation of the Space Engineers Dedicated Server, a configured server instance with a world, and the numeric ID for every mod you want to load. Decide the platform first: Steam Workshop is the PC/Steam route, while Mod.io is required for Xbox-only and mixed PC/Xbox servers.
- Dedicated-server software: install it from Steam’s Library > Tools list, or install it with SteamCMD using app ID
298740. - A server world: mods belong to an individual world, not to the installation globally.
- Mod IDs: copy the number from a Steam Workshop URL or the numeric ID shown on a published Mod.io page.
- Access to the server manager: the controls are labelled Active Mods or Subscribed Mods, depending on the interface version.
The general installation minimums and recommended hardware published for dedicated servers describe hosting capacity, not a guaranteed mod limit. Large or numerous mods can still increase download time, memory use, and startup time, so treat the official hardware guidance as a baseline rather than a promise that every mod collection will run comfortably.
How do you install the Space Engineers Dedicated Server?
Use Steam’s Tools library for the simplest setup. SteamCMD is useful when the machine runs without the normal Steam client or when you want the files in a specific directory.
Install through Steam
- Open Steam and select Library.
- Change the library filter to Tools.
- Find Space Engineers Dedicated Server and install it.
- Open the installation and launch
SpaceEngineersDedicated.exe.
Install with SteamCMD
Run SteamCMD and replace <folder> with the directory where the dedicated server should be installed:
+login anonymous +force_install_dir <folder> +app_update 298740 +quitThe command downloads or updates the dedicated-server application. After it finishes, launch SpaceEngineersDedicated.exe from that installation.
How do you create the server instance and world?
The executable opens the dedicated-server configuration flow. Create or select the server entry and the world that will contain the mods before editing the mod list.
- Run
SpaceEngineersDedicated.exe. - Choose the local/console server entry presented by the setup window.
- Continue to server configuration.
- Enter the server name and world name, or select an existing world.
- Save the configuration, but do not assume a mod has been enabled merely because the server software is installed.
Mods are saved with the selected world. If you configure one world and later start another, check that second world’s settings separately; the mod list does not automatically become a global setting for every save.
How do you add Workshop or Mod.io mods?
Open the server manager’s Active Mods or Subscribed Mods control and add each mod by its platform-qualified ID. The ID identifies the published item; it is not the mod’s display name.
Find a Steam Workshop ID
- Open the mod’s Steam Workshop page.
- Read the numeric value in that page’s URL.
- Enter that number in the server manager, either by itself where the interface accepts a Steam ID or as
Steam:123456789.
Use the number, not the full web address and not the title shown to players. Check the digits carefully: one incorrect digit points the server at a different item or at nothing at all.
Find a Mod.io ID
- Open the published mod’s page on Mod.io.
- Copy the numeric mod ID shown on that page.
- Add it with the platform prefix
mod.io:123456789when the manager uses the qualified format.
The exact prefix matters. A Steam Workshop number entered as a Mod.io item, or a Mod.io number entered as a Steam item, will not retrieve the intended content.
Add every dependency deliberately
If a mod’s published page identifies required companion mods, add those IDs as well. The dedicated server can only download and load items that are present in the world’s configured list; relying on a player’s personal subscription does not configure the server world.
How do you save, start, and verify the modded world?
After entering the IDs, save the server configuration and start the server. Then verify the world itself, because that is where Space Engineers records the active mod set.
- Save the changes in the server manager.
- Start or restart the dedicated server.
- Open the selected world’s settings.
- Go to World Settings > Mods.
- Confirm that every intended mod appears and that unwanted entries are absent.
Check load order after adding, removing, or reordering items. The official Mods documentation warns that the dedicated-server GUI and the save files display order differently, so the sequence you see in one place is not necessarily visually identical in the other. Use the world’s saved mod list as the record of what that world will load.
Can Xbox players use Steam Workshop mods?
No. Xbox players can use mods hosted through Mod.io, not Steam Workshop items. A server intended for Xbox players—or for a mixture of PC and Xbox players—should therefore use Mod.io-hosted mods throughout its configuration.
| Server audience | Use this mod service | ID format |
|---|---|---|
| Steam PC only | Steam Workshop | Steam:123456789 (or the Steam numeric ID where accepted) |
| Xbox only | Mod.io | mod.io:123456789 |
| Mixed PC and Xbox | Mod.io | mod.io:123456789 |
Tell players which platform the server uses before they join. Selecting a Steam-only collection for a cross-platform server creates a platform mismatch even when the IDs and world settings are otherwise correct.
Why will a Workshop mod not download?
Start with the server’s workshop_log.txt and read the final failure reason. That log is more useful than guessing from the manager’s mod list because it records the download operation that actually failed.
Read the download log
- Stop the dedicated server if it is still running.
- Open the dedicated-server logs directory.
- Open
workshop_log.txt. - Read the last error associated with the mod download and compare its ID with the one in the server configuration.
If the log shows a Steam-client or missing-library problem, use the official DLL recovery procedure rather than moving mod folders by hand.
Refresh the Steam libraries used by the server
When Steam mod downloads fail, the official setup guidance recommends copying these files from the Steam client or SteamCMD directory into the server’s DedicatedServer64 directory:
steamclient64.dlltier0_s64.dllvstdlib_s64.dll
Stop the server before replacing the files, then start it again and check workshop_log.txt for a changed result. Copy the files from a matching Steam installation rather than renaming unrelated DLLs.
Reset a corrupted Workshop manifest
If the log points to a damaged Workshop cache or manifest, shut down the server and delete appworkshop_244850.acf. Removing that manifest forces the server to download its Workshop mods again on the next start. This is a cache reset, not a replacement for correcting an invalid ID or choosing the wrong platform service.
Do not place Workshop server mods in the general Mods folder
The installation folder’s general Mods directory is not the normal location for Workshop server mods; the modding tutorial explicitly says that folder is not used for this workflow. Add Workshop items through the server manager’s mod controls so the world stores the correct service and ID.
What are the most common configuration mistakes?
- Using a display name instead of an ID: enter the numeric Workshop or Mod.io identifier.
- Omitting the service prefix: when the manager expects qualified IDs, use
Steam:ormod.io:. - Editing the wrong world: verify the active world before checking World Settings > Mods.
- Choosing Steam Workshop for Xbox: replace those entries with Mod.io-hosted equivalents.
- Assuming the GUI order is the save-file order: inspect the saved world’s mod list after changes.
- Copying files into the wrong directory: the documented DLL repair targets
DedicatedServer64; the generalModsfolder is not the Workshop installation path. - Ignoring the final log line: use
workshop_log.txtto distinguish a bad ID, platform mismatch, cache failure, or Steam-library problem.
Should you self-host or use managed hosting?
Self-hosting gives you direct access to the Windows installation, configuration files, logs, DLLs, and Workshop manifest. Managed hosting removes much of the operating-system and update work, but you must use the host’s control panel and support process when a mod download fails.
| Consideration | Self-hosted dedicated server | Managed server |
|---|---|---|
| Installation and updates | You install the Dedicated Server or SteamCMD and maintain it. | The provider handles the machine and usually exposes a setup panel. |
| Files and logs | Full access to workshop_log.txt, DLLs, and appworkshop_244850.acf. |
Access depends on the provider’s file manager and support policy. |
| Mod troubleshooting | You can perform the documented DLL and manifest recovery directly. | You may need provider assistance for restricted files. |
| Platform choice | You choose Steam Workshop or Mod.io according to the player audience. | Confirm that the plan supports the platform and mod service you need. |
| Recurring cost | No hosting subscription, but you supply and maintain the Windows machine and connection. | A recurring hosting fee; current pricing and availability vary by provider and region. |
Keen Software House’s dedicated-server documentation names GTX Gaming as the official host for the PC version and Nitrado as the official host for the Xbox version. Verify current availability, platform support, and terms directly with a provider before committing, especially for a mixed PC/Xbox world.
How can you keep a modded server maintainable?
Keep a written inventory of the world name, service prefix, numeric ID, and intended load order for each mod. When a publisher updates or removes an item, compare that inventory with the IDs shown in the world settings and with the final lines of workshop_log.txt.
- Make one controlled change at a time so a failed download has a clear cause.
- Save the server configuration before restarting.
- After every edit, verify World Settings > Mods and inspect the order in the saved world.
- For Xbox or mixed-platform communities, reject Steam-only entries before troubleshooting downloads; they cannot satisfy the platform requirement.
- Keep the dedicated-server files and Steam client/SteamCMD components current enough to provide the DLLs required by the official recovery procedure.
Following that sequence—install the server, configure the world, add service-qualified IDs, verify the world list, and use the log for failures—keeps mod installation reproducible instead of dependent on a player’s local subscriptions.
Frequently Asked Questions
Can I install mods by copying files into the server’s installation directory?
Not for Workshop server mods. The documented workflow records published items through the server manager, and the general installation Mods directory is specifically not used for this purpose.
How can I tell whether an ID belongs to Steam Workshop or Mod.io?
A Steam ID is the number in a Workshop page URL. A Mod.io ID is the number displayed on the published Mod.io mod page; use the matching Steam: or mod.io: service label when the manager accepts qualified IDs.
What does deleting appworkshop_244850.acf actually change?
It clears the server’s Workshop subscription/cache manifest. On the next start, the server rebuilds that manifest by downloading the configured Workshop mods again; it does not convert Steam items into Mod.io items or repair an incorrect numeric ID.
Who should use a managed Space Engineers server?
Managed hosting suits an administrator who does not want to maintain the Windows executable, SteamCMD files, DLLs, and logs personally. Confirm that the provider exposes the mod service and platform combination your players require before signing up.