Install a Necesse dedicated server via SteamCMD (Windows and Linux)

Want to self-host your Necesse server to adventure with friends without depending on a hosting provider? This step-by-step guide walks you through installing the official dedicated server via SteamCMD. All commands, App ID and ports verified against the official Necesse wiki and official server page.

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Hardware requirements

Necesse typically uses 1-1.5 GB in normal usage. Up to 2 GB for large colonies with many settlers.

Step 1 — Install Java 17

Necesse is built with libGDX and requires Java 17+.

Windows

Download OpenJDK 17 from adoptium.net and install.

Linux

sudo apt update
sudo apt install openjdk-17-jre -y
java -version

Step 2 — Download SteamCMD

Windows

1. Download: https://steamcdn-a.akamaihd.net/client/installer/steamcmd.zip
2. Extract to C:\steamcmd\
3. Run steamcmd.exe once (auto-update)

Linux (Ubuntu/Debian)

sudo apt install lib32gcc-s1 wget unzip -y
mkdir ~/steamcmd && cd ~/steamcmd
wget https://steamcdn-a.akamaihd.net/client/installer/steamcmd_linux.tar.gz
tar -xvzf steamcmd_linux.tar.gz
./steamcmd.sh +quit

Step 3 — Install Necesse server (App ID 1169370)

The dedicated server App ID is 1169370 (not to be confused with 1169040, the game client App ID).

Windows

steamcmd.exe +force_install_dir C:\NecesseServer\ +login anonymous +app_update 1169370 validate +quit

Linux

./steamcmd.sh +force_install_dir /home/necesse/NecesseServer/ +login anonymous +app_update 1169370 validate +quit

Download size: ~200 MB.

Step 4 — Open network port

Necesse uses a single UDP port 14159 by default.

Windows — Admin PowerShell

New-NetFirewallRule -DisplayName "Necesse" -Direction Inbound -Protocol UDP -LocalPort 14159 -Action Allow

Linux — UFW

sudo ufw allow 14159/udp
sudo ufw reload

Forward UDP port 14159 on your router toward the server LAN IP.

Step 5 — First start

Windows

Run StartServer.bat in the install folder.

Linux

cd /home/necesse/NecesseServer
chmod +x StartServer.sh
./StartServer.sh

Wait for:

Server is now running on port 14159

Stop cleanly with /stop in the console.

Step 6 — Customize server.cfg

cfg/server.cfg is generated on first run:

serverName=My Necesse Server EN
worldName=world
slots=10
pauseWhenEmpty=true
password=
motd=Welcome to the community server!
unloadInactiveLevelSeconds=600
giveClientsPower=false
serverPort=14159

Step 7 — Import an existing solo world

1. Locate your solo save:
   • Windows: %APPDATA%\Necesse\saves\<world>\
   • Linux: ~/.config/Necesse/saves/<world>/
2. Copy the folder to <NecesseServer>/saves/
3. Set worldName=<world> in server.cfg
4. Restart the server

Step 8 — Admin commands (in-game/console)

Step 9 — systemd service (Linux)

Create /etc/systemd/system/necesse.service:

[Unit]
Description=Necesse Server
After=network.target

[Service]
Type=simple
User=necesse
WorkingDirectory=/home/necesse/NecesseServer
ExecStart=/home/necesse/NecesseServer/StartServer.sh
Restart=on-failure

[Install]
WantedBy=multi-user.target

sudo systemctl enable --now necesse

Step 10 — Update the server

steamcmd.exe +login anonymous +force_install_dir C:\NecesseServer\ +app_update 1169370 validate +quit

Always back up saves/ before major updates.

FAQ

App ID 1169040 vs 1169370?

1169040 is the client. 1169370 is the dedicated server, distributed free via anonymous SteamCMD.

How much RAM?

2 GB for 4-6 players and modest colonies. 4 GB for 10 players + active colony.

Why Java?

Necesse is built with libGDX (Java). The dedicated server needs Java 17+.

Server not showing in browser?

Check: UDP port 14159 open (firewall + router), serverPort=14159 in config, correct public IP.

Can I host multiple worlds?

No — one Necesse server hosts one world at a time. Change worldName in config and restart.

Conclusion

You now have a working Necesse dedicated server via SteamCMD. Recommended next steps:

1. Customize server.cfg with your name and settings
2. Enable automatic backups via cron or scheduled task
3. Grant admin rights to moderators with /op <player>

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Further reading

• Necesse hosting from €9.90/month
• Official Necesse wiki — Multiplayer
• Official Necesse server page