Co-op Campaign - 2 Players
Mission 1: Osiris - Normal Difficulty
Skulls: Catch, Fog, Famine & THunderstorm
Score Attack: On
With the above settings, your goal is to run through the mission as fast as possible while killing all the enemies and focusing on multikill medals for extra points. You should be able to complete the mission in around
7 minutes, and you scores will double upon completion. As long as one of the players finishes with at 250,000 points, you will unlock all 5 available score attack DLC achievements:
The Party Hearty achievement in Halo 5: Guardians worth 117 pointsComplete a mission in Score Attack co-op, with all participants scoring at least 200,000 points.