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Halo: The Master Chief Collection Achievements

Official Steam achievement definitions and latest reported global unlock rates, ordered from rarest to most common.

Total achievements700

Rarest rate0.500%

Ultra rare56

Last checkedSep 28, 2026

Delayed official data

Rates and award counts were last observed on Sep 28, 2026.

661

Assault on the Control Room

Halo CE: Complete Assault on the Control Room.

Uncommon

31.7%last reported global rate

662

Send Me Out... With A Bang

Halo: Reach: Complete The Pillar of Autumn.

Uncommon

32.0%last reported global rate

663

Brovershield

Complete any co-op level on Heroic difficulty.

Uncommon

32.2%last reported global rate

664

Cairo Station

Halo 2: Complete Cairo Station.

Uncommon

32.4%last reported global rate

665

This Is Not Your Grave

Halo: Reach: Complete The Package.

Uncommon

32.9%last reported global rate

666

Game On

Complete 50 missions or multiplayer games.

Uncommon

33.2%last reported global rate

667

Your Heresy Will Stay Your Feet

Halo: Reach: Kill the Elite Zealot before he can escape during Tip of the Spear.

Uncommon

33.7%last reported global rate

668

What About Bob?

Halo: Reach: Find and eliminate one of the hidden Ranger Commander Elites.

Uncommon

34.3%last reported global rate

669

THE Chips Dubbo?

Halo 2: Fight alongside the legendary Chips Dubbo and listen to his words.

Uncommon

34.5%last reported global rate

670

Dust And Echoes

Halo: Reach: Complete New Alexandria.

Uncommon

34.7%last reported global rate

671

Can't Keep Him Down

Halo 3: Fight alongside and listen to The Man. The Legend. Chips Dubbo.

Uncommon

34.8%last reported global rate

672

Front Page News

Halo: Reach: Find me in the club.

Uncommon

35.1%last reported global rate

673

The Silent Cartographer

Halo CE: Complete The Silent Cartographer.

Uncommon

35.5%last reported global rate

674

Into The Howling Dark

Halo: Reach: Complete Exodus.

Uncommon

35.9%last reported global rate

675

Gruntageddon

Kill 1000 Grunts.

Uncommon

36.4%last reported global rate

676

You Flew Pretty Good

Halo: Reach: Complete Long Night of Solace.

Uncommon

37.7%last reported global rate

677

Truth and Reconciliation

Halo CE: Complete The Truth and Reconciliation.

Uncommon

38.3%last reported global rate

678

Delicious Brains

Kill 100 Flood.

Uncommon

38.6%last reported global rate

679

Bite The Hand

Kill a 343 developer in matchmaking or someone who has this achievement.

Uncommon

39.9%last reported global rate

680

To War

Halo: Reach: Complete Tip of the Spear.

Uncommon

40.7%last reported global rate