Minigalaxy is described as 'A simple GOG client for Linux' and is an app in the Gaming Software category. There are eight alternatives to Minigalaxy for a variety of platforms, including Windows, Mac, Linux, Online / Web-based and Android. The best alternative is itch.io, which is both free and Open Source. Other great apps like Minigalaxy are GOG GALAXY (Free), Epic Games Store (Free), Game Jolt (Free, Open Source) and Legendary (Free, Open Source).
itch.io gives you the ability to design a page where people can download games you have uploaded. You can optionally put a minimum price on your game (which can be 0), giving people the opportunity to pay you what they think you deserve. All files and images are hosted on itch.
The gaming Client designed for a convenient purchasing, playing and updating DRM-free games, as well as an online play between gaming platforms, GOG GALAXY is also built with optionality in mind, and a belief that you should own the games you buy
The Epic Games store is now open, featuring games from other developers. Epic's goal is to bring you great games, and to give game developers a better deal: they receive 88% of the money you spend, versus only 70% elsewhere.
Legendary is an open-source game launcher that can download and install games from the Epic Games platform on Linux and Windows. It's name as a tongue-in-cheek play on tiers of item rarity in many MMORPGs.
The Rockstar Games Launcher is a new Windows desktop application that allows you to quickly and easily access your Rockstar Games PC collection in a single place, across both digital and disc-based titles including ones purchased from various other digital stores.
Heroic is an Open Source Game Launcher for Linux, Windows (Beta) and MacOS (Limited to Windows games using Wine/Crossover). Right now it supports launching games from the Epic Games Store using Legendary, a CLI alternative to launch epic games.