In addition to Halo 5, Halo 6, and the new Halo TV series, it appears Microsoft is working on yet another project in the science-fiction series.

A listing for "Bootcamp" appeared on the Korean Game Rating Board today (via GameFront) with Halo 3 mentioned in its product description, suggesting the project could be the long-rumored Halo 3 PC port.

A Microsoft spokesperson confirmed with GameSpot that Bootcamp is something unrelated to the company's other Halo endeavors, but wouldn't go into further detail.

"What's Bootcamp? It is not related to our Xbox One efforts, or the Reclaimer Saga, but rather a project we're very enthusiastic about and will have more to say about in the near future," the company said.

As GameFront points out, Bootcamp is referenced in the title of Brian Reed's novel Halo: Fall of Reach: Boot Camp.