This is a very interesting project, I had some limitation with GameVault with my quite large library.

The main ones were no real Linux support and one game per platform (resulting in many duplicates). And the philosophy of AGPL-v3 is closer to mine than the “source available” commercial stuff of GameVault. For now I’ll keep GameVault, I might run Drop in parralel using the compatibility flat thing so my library works on both and will switch completely to Drop once I have tested the experience and the project reach more maturity because their roadmap is hot as hell.

Thanks for sharing, I added it to AlternativeTo so more people can discover it.