I’m moving away from proprietary apps and want to find open-source games on Android that are genuinely good, not just time-killers or kids’ titles.
My criteria:
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Truly open source (repository available, ideally on F-Droid)
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No ads, no trackers, no in-app purchases
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Modern feel and polished experience — something that feels like a real game, not a tech demo
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Made for adults: deep gameplay, challenge, real progression (any genre welcome — strategy, roguelike, RPG, racing, puzzle…)
I trust actual players over AI-generated lists, so: what open-source game on Android gave you the best experience, and why?


Endless Sky is available from F-Droid. I personally found the UI to be a tad clunky, but that might simply be because I’m used to playing it on desktop. You might find that worth your time.
I played it the first time on my phone but the desktop version is way less of a pain in the ass and I don’t think I can go back to the android one.
I saw a mod to make the android UI more useable, not sure how it works as I play endless sky on pc