Key - Achievement - Halopedia, the Halo wiki

Key

Halo: The Master Chief Collection

Key is an achievement in Halo: The Master Chief Collection. This achievement is obtained when a player completes all chapters in Spartan Ops Episode 9.

v • d • e

Achievements in Halo: The Master Chief Collection (list)

v • d • e Halo 4

Campaign completion	Dawn • Requiem • Forerunner • Infinity • Reclaimer • Shutdown • Composer • Midnight • Librarian's Gift • Wake Up, John • I Need a Hero • The Legend of 117 • Lone Wolf Legend • Operation Completion • Departure • Artifact • Catherine • Didact's Hand • Memento Mori • Scattered • Invasion • Expendable • Key • Exodus • Feet First • Term of Enlistment • Hazard Pay • Icarus • Smooth Operator

Campaign scoring	Piece of Cake • Interloper • Raging in the Dark • Ouroboros • Gimme That • Shut. Down. Everything. • Symphony of Pain • Countdown • Easy As One Two Three • Gunslinger • Dark Fortress • Shadow of Sundered Star • Jungle Warfare • Librarian's Pet • Emergency Shutdown • Head Banging • Witching Hour • You Had it Coming

Collectibles	War • Lord of Admirals • Charum Hakkor • Flood • Knights • Justice • Cryptum • Terminus

Easter eggs	Digging up the Past • Roses vs Violets

Miscellaneous	A Long Time Ago • This is my Rifle, this is my Gun • Bros to the Close • Mortardom • Explore the Floor • Give Him the Stick • Chief, Smash! • You're No Chips • Naked Tyrant • Devotee • Chest of Gold • You're Joking • No One Left Behind • Knight in White Assassination • What Power Outage? • No Easy Way Out • Going International • Taste Test

Key (achievement)