Kill 100 Brutes. - Halo: The Master Chief Collection
Complete any co-op level on Legendary difficulty. - Halo: The Master Chief Collection
Play a multiplayer or co-op game at least 3 months after your first game. - Halo: The Master Chief Collection
920/25,475555/7,00062/700
1,316/4,653660/1,25049/70
1,190/4,080465/1,0009/22