BXR Mining

On mission 5 of Halo Reach "Tip of the Spear," you'll come accross a mining facility that the covenant are using as a stronghold. Some Halo players will recognize the logo and name of the facility.

The name is "BXR" and the logo depicts three dots, one blue, one yellow, and one red. This is likely in reference to the button press combo that caused an instant kill that ran rampant in Halo 2.