There are a few on itch.io: https://itch.io/games/platform-web/tag-open-source/tag-real-time-strategy https://itch.io/games/platform-web/tag-open-source/tag-rea

There are a few on itch.io: https://itch.io/games/platform-web/tag-open-source/tag-real-time-strategy https://itch.io/games/platform-web/tag-open-source/tag-real-... Open source games are not really constrained by devs, I think. I'd say that dev work is the one that's best covered in the open source game development. Project management, marketing, asset production, user experience, quality assurance, product management seem to be much more underserved.