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Abiotic Factor can be run as a dedicated server rather than relying on one player’s game session. In 2026, you have two practical choices: install the server files on a Windows machine you control, or rent a server/VPS and let a provider supply the always-on computer. Self-hosting avoids a recurring hosting bill when you already have suitable hardware, but you must manage installation, updates, router forwarding, firewall rules, passwords, availability, and backups.
The Windows procedure below follows the community quickstart currently available for the game. Its SteamCMD App ID, executable path, launch arguments, ports, and player-count example can change, so verify them against the live dedicated-server listing and current documentation before deploying a long-running world.
What a dedicated Abiotic Factor server does
A dedicated server keeps the game world running independently of any player’s normal game client. Friends connect to that process, and the computer running it must remain online whenever the world is expected to be available. The host does not need to play from the same machine, although an administrator can join like any other player.
A developer-pinned Steam community announcement dated May 2, 2024 directs players to the game’s dedicated-server setup wiki. That announcement establishes that a dedicated-server route exists; it does not establish a current hardware minimum, a definitive player cap, or permanent port numbers.
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Choose self-hosting or a rented server
Decide where the process will run before installing anything. A home server is economical when you have an unused computer, but inbound connections depend on your router and internet provider. A rented game server or gaming VPS removes the need to keep personal hardware powered and can provide a control panel, remote console, and managed networking. Those conveniences vary by provider and plan.
| Decision | Self-hosted PC or spare computer | Rented server or VPS |
|---|---|---|
| Hardware | You supply a machine that can stay on. No official minimum specification has been established. | The provider supplies compute resources; CPU, memory, storage, and location depend on the tier. |
| Initial setup | Install SteamCMD and server files, create launch settings, configure the operating-system firewall, and usually forward router ports. | Often uses a control panel or preconfigured image. Confirm that the current Abiotic Factor dedicated-server build is supported. |
| Ongoing work | You handle uptime, updates, save copies, password changes, and troubleshooting. | Responsibility differs by provider. Ask who performs updates, what support covers, and how restoration works. |
| Network access | Requires a reachable home connection, router configuration, and an allowed inbound path. | Usually avoids home-router forwarding, but verify that the plan supplies the UDP ports you need. |
| Cost pattern | No hosting subscription when existing hardware is used, but electricity, storage, and maintenance still have a cost. | Recurring charge in exchange for provider-supplied capacity and, sometimes, management. |
| Best fit | An owner comfortable administering Windows and a home network. | Someone who wants an always-on world without maintaining a computer at home. |
When self-hosting is sensible
- You have a machine that can remain powered and connected while players may be online.
- You can sign in to the router or firewall that controls the internet connection.
- You are comfortable applying updates and keeping independent copies of save data.
- You accept that a home power or internet outage makes the world unavailable.
When renting is simpler
- You do not want to expose or reconfigure a home network.
- No computer is available to run continuously.
- You prefer a provider’s panel, remote console, monitoring, or support.
- You need a data-center location closer to most players.
Requirements and limits you should verify
The available setup material does not provide an official hardware baseline or a benchmark-backed CPU, memory, or storage requirement. Do not treat a particular amount of RAM or a processor tier as guaranteed. For a home machine, leave headroom for Windows and other services, use reliable storage, and watch memory and CPU usage after players join rather than assuming a published minimum.
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Linux support is also unresolved in authoritative current documentation. The community quickstart describes its dedicated-server note as Windows-only and points Linux users toward community guidance, while a hosting guide claims Windows and Linux support. If you need Linux, confirm that the current server build and launch method are explicitly supported before paying for a Linux instance.
The current player limit is not established by the available primary information. The Windows quickstart uses -MaxServerPlayers=6 as an example. A separate community container project reports a default of 6 and a maximum of 24, while a provider guide describes an 8-player co-op cap. Those claims conflict, so regard 6 as a sample setting, not proof of the game’s maximum. Check the current dedicated-server documentation and in-game behavior for the version you install.
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Install the Windows dedicated-server files with SteamCMD
The following workflow reflects the community quickstart last modified August 3, 2025. Steam distribution details can change, so recheck the live Steam tool listing and the setup wiki before using the App ID in a production script.
- Install SteamCMD. Download and extract the official SteamCMD tool for Windows into a folder you administer, such as
C:steamcmd. Do not place a live server in a directory where ordinary users cannot write save data. - Open a command prompt in the SteamCMD folder. Use an account with permission to create the destination directory.
- Log in anonymously and choose an install directory. The quickstart uses anonymous login and App ID
2857200. An equivalent SteamCMD command sequence is:
steamcmd.exe +login anonymous +force_install_dir "C:AbioticFactorServer" +app_update 2857200 validate +quit- Wait for validation to finish. Do not launch until SteamCMD reports that the update has completed. If the App ID is rejected or resolves to a different tool, stop and confirm the current listing instead of guessing another identifier.
- Locate the Windows binaries. The quickstart places the launch file in
AbioticFactorBinariesWin64and invokesAbioticFactorServer-Win64-Shipping.exe. Paths and executable names are quickstart-specific; confirm that the files exist in the version SteamCMD installed.
Create a Windows launch file
Create a plain-text file in AbioticFactorBinariesWin64. Naming it RunServer.bat makes it straightforward to start by double-clicking, but ensure Windows has not silently added a second .txt extension. Keep the command on one line:
AbioticFactorServer-Win64-Shipping.exe -log -newconsole -useperfthreads -NoAsyncLoadingThread -MaxServerPlayers=6 -PORT=7777 -QueryPort=27015 -ServerPassword=YourServerPassword -AdminPassword=YourAdminPassword -SteamServerName="Your Server Name"Replace the sample server name and both passwords with values of your own. The -MaxServerPlayers=6 value is the quickstart’s example, not a verified current maximum. Likewise, 7777 and 27015 are example/default values from community documentation, not a universal specification.
What the arguments mean
| Argument | Purpose and qualification |
|---|---|
-log |
Requests log output so startup and connection errors are visible in the server window. |
-newconsole |
Uses a separate console window in the quickstart example. |
-useperfthreads |
A performance-related launch option included by that example; retain it only if it remains valid for the installed build. |
-NoAsyncLoadingThread |
Another quickstart launch option. Treat all launch flags as version-sensitive. |
-MaxServerPlayers=6 |
Sets the example’s intended capacity to six connections. It does not establish the current game-wide cap. |
-PORT=7777 |
Sets the game traffic port in the example. |
-QueryPort=27015 |
Sets the Steam query port in the example. |
-ServerPassword=... |
Sets a join password. Omit it only if you intentionally want an unrestricted server and have checked the current syntax. |
-AdminPassword=... |
The quickstart says this enables in-game administrator access. Protect it like any other privileged credential. |
-SteamServerName="..." |
Controls the name displayed to people looking for the server. |
Granting administrator access without the launch password
The quickstart describes an alternative using AbioticFactorSavedSaveGamesServerAdmin.ini. Add the operator’s Steam ID under [Moderators] if you use that method. Its note says this Steam-ID approach does not work for Xbox or PlayStation users, so do not assume it grants console accounts administrator rights.
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Open the required network paths
If the process runs on a home network and the server does not appear in the browser, the quickstart advises forwarding ports 7777 and 27015. A separate community container project labels UDP 7777 as game traffic and UDP 27015 as Steam queries. Use those as the starting values only when they match your launch arguments.
- Give the host a stable local address. Create a DHCP reservation in the router for the server computer, or assign a suitable static address according to your network’s conventions. A changing local address will invalidate a forwarding rule.
- Create router forwarding rules. Forward UDP 7777 and UDP 27015 from the router’s public interface to the host’s local address. If you changed
-PORTor-QueryPort, forward the new values instead. - Allow the executable through Windows Firewall. In Windows, open Windows Security > Firewall & network protection > Advanced settings, create inbound rules for the server executable or the configured UDP ports, and apply them only to the network profiles you actually use. Your exact labels may vary by Windows release.
- Check any upstream firewall. A cloud security group, managed router, double-NAT arrangement, carrier-grade NAT, or ISP policy can block unsolicited inbound traffic even when Windows and the first router are configured correctly.
- Test from outside the home network. Have a friend try to find and join the server using a different internet connection. Testing only from the host’s own LAN can produce a false sense that remote access works.
Some internet connections do not provide a publicly reachable IPv4 address. If the router’s WAN address differs from the address shown by an external service, or if the WAN address is in a private or carrier-grade range, ask the ISP whether inbound hosting is possible. Do not publish your home IP unnecessarily.
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- Close any old server process using the same ports.
- Run
RunServer.batfrom the binary directory, or launch the executable with the same arguments in a command prompt. - Watch the console for file, port, or permission errors. Leave the window open while testing so you can capture the first failure.
- From a client on the same network, search for the exact
-SteamServerNamevalue. If local discovery works but an outside player cannot connect, focus on router, ISP, and firewall configuration rather than reinstalling the files. - Join with the ordinary player account first, then test administrator functions separately. This confirms that the join password and admin credential are not being confused.
- Stop the process cleanly before moving or copying save files. Abrupt power loss can leave the latest world state unwritten.
Save data, updates, and safe operation
Separate saves from the installation
A community container project documents a configurable world-save name and keeps saved data separate from the game installation. Your exact save location can differ by build and launch method. Identify the active save directory by creating a small test world, stopping the server normally, and checking which files receive a new timestamp. Record that path before the world becomes important.
Back up before updates
Make a versioned copy of the complete save directory before applying a server update. A practical rotation is a dated copy before every update plus several older copies stored on a different disk or machine. A hosting guide recommends scheduled, versioned save backups; this is sound operational practice, not an official game requirement.
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Update in a reversible order
- Announce a maintenance window and stop new joins.
- Stop the server cleanly.
- Copy the save directory and note the current server build.
- Run SteamCMD with
app_update 2857200 validate, after confirming that the App ID remains current. - Start the server and check logs before inviting everyone back.
- If the world fails to load, stop the process and restore the pre-update save copy rather than repeatedly launching against it.
Protect credentials
- Use separate, long passwords for joining and administration.
- Do not paste the admin password into public chat, screenshots, or a shared configuration repository.
- Restrict file and folder permissions on the host account.
- Remove old administrators from
Admin.iniwhen they no longer need access. - Keep the host operating system and remote-access software patched.
What rented capacity may cost
There is no independent market benchmark in the available material. One provider’s dated estimate, updated August 27, 2026, gives the following tiers. These are that provider’s commercial figures, not guaranteed requirements or an average price across hosts.
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|---|---|---|---|
| Small team, 1–4 players | 3–4 vCPU, 8 GB RAM, 20 GB NVMe | $14–$22 per month | Vendor estimate; availability and price can change. |
| Standard team | 4–6 vCPU, 10–12 GB RAM, 30 GB NVMe | $24–$36 per month | Vendor estimate; not an official game requirement. |
| Maximum-team tier | 6–8 vCPU, 14–16 GB RAM, 40 GB NVMe | $38–$55 per month | Vendor estimate; does not prove the game’s player cap. |
Before ordering, ask the provider these specific questions:
- Does the current dedicated-server build install successfully on the offered operating system?
- Who applies game updates, and can you delay an update until your save is backed up?
- Are scheduled, downloadable, and versioned backups included?
- Can you choose custom UDP game and query ports?
- What happens to your save data if you cancel?
- Is the advertised CPU allocation shared, burstable, or dedicated?
- Where is the data center, and is remote console access included?
Troubleshooting by symptom
SteamCMD cannot install the app
Confirm that SteamCMD is current, that anonymous login completed, and that the destination directory is writable. Recheck App ID 2857200 against the live tool listing rather than substituting an App ID from an old forum post. Run validation again only after confirming the identifier.
The executable is missing
Search the installation directory for AbioticFactorServer-Win64-Shipping.exe. If the expected AbioticFactorBinariesWin64 path is absent, the install may have targeted a different directory or the build layout may have changed. Do not copy an executable from another user’s installation.
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The server window closes immediately
Start the command from an already-open prompt so the error remains visible. Check the working directory, quote paths containing spaces, remove a launch flag that the current build rejects, and verify that the configured ports are not occupied by another process.
The server runs locally but friends cannot see it
Check Windows Firewall first, then confirm that router forwarding points to the host’s current local address and uses UDP. Verify that the forwarded ports match the command line. Finally, investigate double NAT, carrier-grade NAT, or an ISP block. A local client finding the server does not prove that the public route is open.
Players connect but the world rolls back
Stop the server cleanly, inspect save timestamps, and restore the newest known-good backup if necessary. Check that the service account can write to the save directory and that scheduled backups are not copying files while the process is actively writing them.
Players cannot agree on capacity
Do not infer the cap from the sample value of six. Compare the installed build’s current documentation and configuration behavior. Community reports of 24 and a provider statement of 8 conflict, so select a value that the current server accepts and test it with the number of people you actually intend to host.
Quick Recap
Operating checklist
- Record the installed build and the launch command.
- Keep the host on a stable power and network connection.
- Reserve the host’s local IP address.
- Allow only the required UDP ports through router and firewall layers.
- Store join and admin passwords separately and rotate them when needed.
- Back up saves before every update and retain more than one historical copy.
- Test a restore on a copy of the world rather than experimenting on the only live save.
- Review logs after updates and after changing ports, passwords, or player settings.
- Recheck the current App ID, executable path, launch arguments, and player limit whenever the game server is updated.
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