High-Grinder is a medium sized symmetrical map that is set on the top of a skyscraper. Each base is set high off the ground and requires use of Spartan abilities to climb. The medium level consists of two skybridge that cross a large chasm and two areas in from of each base. Each area has piping and ventilation components that act as cover to use in combat. The lowest level is a large flat area with more ventilation and piping outcrops as well as a rut in the center with more piping running through it. Each side of this area also contains a Wasp.