GameIndex vs GOG Galaxy

GameIndex is a free native launcher and library manager that combines PC game collections from multiple stores. It can sync Steam, GOG, Epic, Rockstar, Ubisoft, and Humble libraries, while also accepting manual imports. Discovery tools include an IGDB-powered storefront, deals, a wishlist, activity tracking, and achievement tracking across platforms. The interface offers six UI styles, theme customization, and a Layout Studio for rearranging elements. GameIndex runs on Windows and Linux, including Steam Deck, with configurable Wine and Proton runners and per-game compatibility settings. Linux packaging includes AppImage and .deb. Integrations listed by the project include Steam Workshop, Nexus Mods, Discord Rich Presence, RetroAchievements, IGDB, and HowLongToBeat. Its social layer is local-first, with a Privacy & Data tab for viewing and wiping local storage, and secrets use the operating system keychain. The project is free to use, modify, and distribute under the MIT License.

GOG Galaxy brings game libraries and friends from different gaming platforms into one app for Windows and macOS. It can collect PC and console games, including titles that are not installed, and track achievements, play time, and owned games across connected services. For PC games, it can install and launch titles owned on different platforms. Library tools include filtering, sorting, tagging, changing game visuals, saving views, and editing metadata. Galaxy combines friends lists, online status, activity, and cross-platform chat. Games can enter the library through official or community-made integrations, or be added manually; community integrations are open source, and GOG provides documentation for creating them. Library changes sync between devices, and offline mode is available. GOG says it does not share imported personal data with third parties and removes it from its servers when a platform is disconnected. GOG-specific features include auto-updates, cloud saves, multiplayer, matchmaking, and rollbacks. Other platforms’ client software is needed for their platform-specific features. The app is free with a GOG account.