Brovershield
From Halopedia, the Halo wiki
Brovershield
Brovershield is an achievement in Halo: Combat Evolved Anniversary. It is awarded for completing any level cooperatively on Heroic difficulty. It is worth 20 gamer points. Receiving this achievement also unlocks the Standard Operating Brocedure achievement if the player hasn't completed a level cooperatively on Normal.
It is represented by two M41 rocket launchers over the difficulty shield.
Trivia
The achievement is a play on the word "Overshield."
