The best open source alternative to LaunchBox is Playnite. If that doesn't suit you, our users have ranked more than 50 alternatives to LaunchBox and many of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to LaunchBox are RetroArch, Lutris, Retrom and Lemuroid.
Open-source launcher and manager organizing PC, emulated, and custom games from platforms such as Steam, GOG, Origin, and Uplay under a single customizable interface, supporting metadata, controller mode, plugins, themes, playtime tracking, and multi-language options.
A fast, modular emulator frontend offering portability and extensive support for systems from arcade consoles to mobile platforms, featuring game engines like Doom and Quake, and capabilities for real-time rewinding and shader support on a variety of devices.
Lutris is an open source gaming platform for GNU/Linux. It allows you to gather and manage (install, configure and launch) all your games acquired from any source, in a single interface.
Centralized game library management service, allowing you to host games on one device and connect multiple clients, supporting cross-platform play and emulation. Easily manage emulator profiles, with web client access for metadata and artwork showcase.
Lemuroid is an open-source emulation project based on Libretro. It's completely free, without ads and focused on ease of use and good user experience.
Lakka is the official Linux distribution of RetroArch and the libretro ecosystem. Each game system is implemented as a libretro core, while the frontend RetroArch takes care of inputs and display.
RetroDECK is a powerful all-in-one retro gaming platform designed for handheld gaming PCs like the Steam Deck, full Linux desktops, Linux HTPC setups, and Linux-based PC consoles such as the Steam Machine.
Pegasus is a graphical frontend for browsing your game library (especially retro games) and launching them from one place. It's focusing on customizability, cross platform support (including embedded devices) and high performance.
RetroBat is a set of Batch and Powershell scripts written to easily configure and launch EmulationStation for Windows. This frontend software is intended to gather your ROMs collection and run games with compatible emulators such as RetroArch.
A simple and lightweight app for running Windows games using UMU-Launcher.
A graphical front-end for command line emulators that hides the underlying operating system and is intended to be controlled with a joystick, gamepad or spin dial. Ideal for use on arcade cabinet setups.
Gavilya is a user-friendly game launcher built using C# .NET 6 and WPF, designed to streamline the gaming experience by consolidating games from various sources into a single, accessible platform. With its intuitive interface and diverse set of features, Gavilya offers gamers a...
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Does the same job for free (completely) and uses the Internet Games Datab which I find better