Microsoft drops DMCA against Luanti, an app its own researchers use

Microsoft has withdrawn the copyright complaint that knocked the open-source game platform Luanti off Google Play, and the app is listed again. According to a September 8 post on the Luanti project's blog, the DMCA notice — filed by Microsoft through Tracer AI and accusing Luanti of infringing Minecraft's copyright — has been rescinded.

What the withdrawal changes

The procedural detail matters. If the notice had remained in place, Luanti's route back to the Play Store would have run through the DMCA counter-notice process, which involves a waiting period before a listing can be restored. Because Microsoft withdrew the notice itself, the app returned sooner than that timeline would have allowed. The Luanti team also reads the withdrawal as a signal that the company has dropped the matter entirely and does not plan to pursue it with a lawsuit.

Microsoft's own researchers use Luanti

The most awkward detail for the complainant surfaced after Luanti's earlier post about the takedown: parts of Microsoft itself build on the platform.

The project points to two efforts. Project VEGA, a collaboration between Microsoft Research and Xbox, describes Luanti as the testbed used for its prototypes and demonstrations. And a paper titled "Beyond Pixel Histories: World Models with Persistent 3D State," from Microsoft Research and the University of Edinburgh, states that the researchers favored Luanti over Minecraft because of its open-source design and its Lua scripting API, which made gathering data and running experiments easier.

The Luanti team says these projects illustrate what the platform is good at: open, flexible, and usable well beyond its core gaming audience.

A win that still cost time

The outcome is favorable, but the project is blunt that it was not free. Resolving the dispute consumed a meaningful amount of the maintainers' time, and the team closes its post by thanking users, readers, and others who supported them through the process. The sign-off includes a pointed hope that this does not happen a third time — wording that suggests at least one earlier takedown episode — and that future updates about the project can go back to being about new features rather than legal matters.

Why it matters

The episode is a compact illustration of what happens when large-scale copyright enforcement collides with open-source ecosystems. A single notice, filed via Tracer AI, was enough to remove a legitimate open-source project from Google's app store, and nearly the entire burden of reversing it fell on volunteers. Even a clean win cost the project time it would rather have spent on development.

It also shows how little coordination can exist inside a large organization. The enforcement side of Microsoft moved against Luanti while its research side was publishing work that chooses Luanti over Minecraft precisely because it is open source. For open-source maintainers, the lesson is that being in the right does not prevent disruption. For rightsholders and platform operators, it is a reminder that automated takedowns benefit from human review before they remove software that even the complainant's own teams rely on.