A lot of old games have become unplayable on modern hardware and operating systems. I wrote an article about how making games open source will keep them playable far into the future.
I also discuss how making games open source could be beneficial to developers and companies.
Feedback and constructive criticism are most welcome, and in keeping with the open source spirit, I will give you credit if I make any edits based on your feedback.
Yee, you’re mot going to be hurt by open sourcing your game 5 or 10 years later. By that time practically nobody will buy your game anymore. And of the ones who still will,.they likely aren’t the ones that would even bother with looking for alternatives other than a big sale on a store page
But then, open sourcing adds to human culture, it lets others modify the game, or use it as a foundation for something new. And those things will credit you, and you will still get some extra benefit/good pr.
It’s just a good thing to do, imo.