Standard Operating Brocedure

Standard Operating Brocedure is an achievement in Halo: Combat Evolved Anniversary and Halo: The Master Chief Collection. It is obtained by completing any Campaign mission Co-op on the Normal Difficulty or higher.halo.xbox.com - Halo: Combat Evolved Anniversary Achievements
==Gallery==
HTMCC AchievementArt StandardOperatingBrocedure.png|The Achievement art
==Sources==
Category:Halo: Combat Evolved Anniversary Achievements
Category:Halo: The Master Chief Collection Achievements