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A Quick Guide to Install and Play GOG Games on Linux
(itsfoss.com)
GOG.com is a DRM-free games and movies distribution service that is part of the CD Projekt Group. GOG.com is also a "sister" company to CD Projekt Red, developers of the Witcher series and Cyberpunk 2077.
Rules:
Heroic was the closest to a steam-like experience for GOG games to me. (While having a very Epic-esque UI).
Lutris worked OK. But seemed to need more tweaking to make things work.