The game itself was for me mid - not good not bad, but the ending? I can’t believe no one mentioned it yet, that was the most impressive ending I’ve experienced in a game ever. Without spoilers, for those who played it, the piano notes and then darkness, I couldn’t believe it, it was so good.
Not sure about that popularity comment, it’s also available on Windows and I know of many people who have been using it for years instead of the crappy Epic Store. And yes, it works great for GOG.