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Complete any co-op level on Heroic difficulty.

2 guidesOnline/OfflineCooperativeMain StorylineDifficulty SpecificStackable
Strategy OneStrategy One672,485
11 Nov 2014 11 Nov 2014
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Simply by playing and finishing any mission in the game on Heroic difficulty with a friend or Co-op.

If you are having difficulty, make sure to use Grenades on Elites and Plasma pistol to take out their shields, headshot them right after with a magnum (or any precise weapon) will kill them.

Completing this achievement will also unlock Standard Operating Brocedure.

Halo: The Master Chief CollectionStandard Operating BrocedureThe Standard Operating Brocedure achievement in Halo: The Master Chief Collection worth 13 pointsComplete any co-op level on Normal difficulty.