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Free, open-source Windows app to run Valheim, Palworld, Astroneer and RuneScape: Dragonwilds dedicated servers without the command line, with built-in Valheim mod management (Thunderstore + Hexium).

Features

• Multiple servers, multiple games: Palworld, Valheim, Astroneer and RuneScape: Dragonwilds from one app, no command line, with port conflicts detected before startup
• Automatic install of SteamCMD and the game server, or import a server that is already installed (game and worlds detected automatically)
• Start / stop / restart with clean shutdown (Palworld REST API, Valheim CTRL+C) so saves don't get corrupted
• Real-time monitoring: CPU, RAM, uptime, online players, server console
• Visual configuration editor for each game (Palworld difficulty presets, Valheim world modifiers)
• Valheim mods: browse, install and update from Thunderstore and Hexium, automatic dependencies, r2modman/Gale profile import, BepInEx config editor, deprecated mods flagged
• Player tracking: history, playtime, sessions (native on Palworld, Valheim via Odin-Eye); kick / ban / unban on Palworld
• Windows firewall: rules created automatically + custom rules
• Scheduled automatic backups with rotation
• Daily scheduled restart with in-game announcement and save
• Built-in app updates
• Bilingual UI: English / French

Screenshots

Dashboard	Mods (Thunderstore & Hexium)
Server configuration	Firewall rules
Player history

Installation

Download the latest version from Releases:

• Installer: nexum-{version}-setup.exe
• Portable: nexum-{version}-portable.exe

No administrator rights needed. Nexum runs as a normal app. Only changing Windows Firewall rules needs them: Windows then asks you to confirm (UAC), once per change.

Windows SmartScreen warning: the installer is not code-signed yet, so Windows may show "Windows protected your PC" on first launch. Click More info → Run anyway. The source code is open (GPL-3.0), and each release lists the SHA256 of its files so you can check your download:

Get-FileHash .\nexum-<version>-setup.exe -Algorithm SHA256

Quick start

1. Launch Nexum: on first launch, the setup wizard opens
2. Pick your game, then Install a new server or I already have a server
3. Follow the steps: installation (SteamCMD + server), configuration, firewall
4. Click Start, then share the address shown under Join the server with your friends

You can run the wizard again for another server from Servers → Setup wizard.

See docs/installation.md for the full guide.

Documentation

• Installation
• Dashboard
• Server configuration
• Network & firewall
• Backups
• Scheduling
• Logs
• Valheim player tracking (Odin-Eye)
• Valheim mods
• RuneScape: Dragonwilds
• Code signing policy and privacy
• Technical architecture

Help & community

• Questions, help, ideas: join the Nexum Discord (there is a channel for French speakers too). From the app, use the Help & Discord button at the bottom of the sidebar.
• Bugs: open an issue on GitHub.

Tech stack

• Electron 44, React 19, MUI 9, TypeScript 6, Vite 5

License

Open source under the GNU General Public License v3.0 or later. You are free to use, study, modify and share the software; any modified version you distribute must stay open source under the same license.

Contributing

The main branch is protected: all contributions go through a Pull Request, and only the project maintainer can merge it.

PR titles must follow Conventional Commits (feat: …, fix: …, chore: …), which is checked in CI. Versions and the CHANGELOG are generated from these titles by release-please: fix bumps the patch version, feat bumps the minor version, and releases are published by merging the release PR it opens.