This is a Dauntless Visor in-game bonus for Halo 5: Guardians.

Halo 5: Guardians delivers epic multiplayer experiences that span multiple modes, full-featured level building tools, and a new chapter in the Master Chief saga. And now with Xbox One X, players can experience enhanced visuals, up to 4K resolution, increased visual details, and improved graphic fidelity that makes the game look better than ever before, all while maintaining a consistent 60FPS for the smoothest gameplay possible.