The story as told by the Covenant - Halo Covenant Edition lets you choose your side in the war, and see Halo behind the scenes as you work from the inside to uncover the truth behind the Covenant power structure.
Fighting one of the three hidden grunt bosses on Assault on the Control Room [b40] - as a grunt
Wait wtf! Why are you a grunt fighting grunts?
He's a secret, rogue grunt