The highest possible rank in Halo: Reach is Inheritor (20,000,000 cR) but the highest rank with Grades is General which has FOUR grades (grades are credit milestones which are included with all ranks up to General).
The highest rank in Halo: Reach is Inheritor.
Capitan
Warrant Officer Grade 3
Lieutenant Colonel grade 1
Inheritor.
Inheritor is the maximum rank so far in halo reach
Major GRADE 2, moron.
I am pretty sure it is a inheritor.
No set grade, play whenever.
There is two ways to get it #1 unlock all of the armor #2 is to become the highest rank in halo reach
its either mythic or eclipse i believe
For when Reach first came out it was lt. cioniel. Or after new ranks it's inheritor