Gaseous

Overview

Gaseous is a self-hosted ROM and game-title manager with basic in-browser emulation. It is most compelling for people who want a single server to organize a broad game collection and play a narrower set of systems; the database and media requirements make it a poor fit for anyone seeking a plug-and-play desktop app.

Key features

Gaseous uses multiple sources to identify games and supply metadata. ROM management spans platforms listed by IGDB, but the built-in emulator supports only a documented subset, including Game Boy, Nintendo 64, PlayStation, Sega Saturn, and Super Nintendo. That makes its cataloguing reach more useful than its playback range: check system support before relying on it as an emulator.

Deployment choices include Docker, source installation, Unraid, and a Windows MSI. Running the server requires MariaDB 11.1.2 or MySQL Server 8+, plus FFmpeg. An IGDB API key is optional; it can also be optional when using the Hasheous proxy. These prerequisites are manageable for a server administrator, but they add meaningful setup and maintenance work compared with a standalone library manager.

From version 2.0, Gaseous supports password authentication, two-factor authentication, and OAuth2/OIDC sign-in. Documented OIDC options include Google, Microsoft, and custom providers. The maintainers advise against exposing the server to the internet when remote access is unnecessary and say exposure is at the user's own risk. That warning deserves weight: users should consider their access needs and security responsibilities before making the service reachable remotely.

Pricing

Gaseous Server costs nothing. The self-hosted plan includes the server, but requires a database and FFmpeg; an IGDB API key is optional when using the Hasheous proxy. The project is open source under the AGPL-3.0 license, with no paid tier described. The zero purchase price does not remove the work of providing and maintaining the server dependencies.

Platforms

Gaseous is a web-based, self-hosted server with Linux and Windows platform support. Windows installation is described as experimental, so users who want the more established deployment paths should consider Docker, source, or Unraid instead.

Who it's for

Choose Gaseous if you want ROM management and basic browser emulation together, have a compatible server environment, and are comfortable managing authentication and network exposure. It is less suitable if you want broad built-in emulation, minimal setup, or remote access without taking responsibility for securing an exposed service.

Pros and cons

• Pros: ROM management covers IGDB-listed platforms and uses multiple identification sources, giving large libraries broad cataloguing reach.
• Pros: Built-in emulation and several deployment routes let users combine basic play and collection management on a self-hosted server.
• Pros: Two-factor authentication and OAuth2/OIDC add sign-in options beyond passwords.
• Cons: The emulator supports a narrower, documented set of systems than the ROM manager can catalogue.
• Cons: A database and FFmpeg are required, so the free software still carries hosting and administration overhead.
• Cons: Windows installation is experimental, and internet exposure carries an explicit user-risk warning from the maintainers.

Alternatives

For other options, browse ROM Management Software or Game Library Managers.

• Igir is a free option for Linux, macOS, Windows, and self-hosting; choose it if those platform options suit your workflow better.
• OxyROMon is free across Linux, macOS, Windows, web, and self-hosted setups, with no paid tiers or usage limits stated.
• RomM is a free, AGPL-3.0 option with web and mobile platform support and no paid features.
• verifydump is a free command-line tool for Linux, macOS, and Windows that verifies .chd and .rvz images against Redump Datfiles; choose it for image verification rather than a server library.
• ClrMamePro is a free option for Linux and Windows.
• RomForge is free, MIT-licensed desktop software for Linux, macOS, and Windows.
• ROMie is free to download and use on Linux, macOS, and Windows, with no paid plans stated.
• ROMSorter is free and MIT-licensed for Linux, macOS, and Windows, though its current release is Win-x64 only.

Verdict

Gaseous is a good choice for technically comfortable users who want a self-hosted ROM catalog with basic browser emulation in the same system. Its broad metadata and deployment options are the main draw; the narrower emulator range, server dependencies, and caution around internet exposure are the reasons to look elsewhere.