Microsoft has accidentally leaked the theme music for Halo 5: Guardians with a recent update to the now defunct beta for the game, along with shots of new multiplayer menus for Warzone and the new 12 -on-12 mode.

This is despite the fact that the Halo 5: Guardians multiplayer beta actually concluded months ago, but during that time players who still had the beta were able to upgrade the beta and even get a look at a bit of Kazuma Jinnouchi’s original soundtrack for the game.

Microsoft has also confirmed the leak officially, with a spokesperson saying:

“It’s unfortunate when work-in-progress content leaks, but this Halo 5: Guardians content is part of our ongoing private, external testing for multiplayer. We will continue to rigorously test Halo 5: Guardians to ensure the best possible experience for fans at launch.”

Check out the video below for a look at the leaked content, we also included a gallery with some screenshots of the leaked menus.

Halo 5: Guardians is set to launch on October 27th exclusively for the Xbox One.

This article may include links to affilates, and if you click on one of these affilate links, we may recieve commission.