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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.

621
Bro Hammer

Complete any co-op level on Legendary difficulty.

Uncommon
22.0%last reported global rate
622
Return

Halo 3: Complete Halo.

Uncommon
22.0%last reported global rate
623
Last Stand

Halo 3: Complete The Covenant.

Uncommon
22.6%last reported global rate
624
Sacred Icon

Halo 2: Complete Sacred Icon.

Uncommon
22.7%last reported global rate
625
The Humble Beginnings of Wiljax Brantley

Halo: Reach: Now that's a value meal.

Uncommon
22.8%last reported global rate
626
Greenhorn

Halo CE: Complete every level of the game on Easy difficulty.

Uncommon
22.9%last reported global rate
627
New Ways to Save a Buck

Halo: Reach: Hear a familiar voice on New Alexandria.

Uncommon
23.1%last reported global rate
628
Hunters Hunted

Kill 50 Hunters.

Uncommon
23.2%last reported global rate
629
Junior Detective

H3: ODST: Find the 1st clue to unraveling the mystery.

Uncommon
23.3%last reported global rate
630
Two Places, Same Time

H3: ODST: I've got my eye on you, Marine.

Uncommon
23.3%last reported global rate
631
Zombie Repeller

Kill 1000 Flood.

Uncommon
23.3%last reported global rate
632
Regret

Halo 2: Complete Regret.

Uncommon
23.4%last reported global rate
633
Refuge

Halo 3: Complete The Ark.

Uncommon
23.7%last reported global rate
634
Splinters

Halo CE: Activate Terminal 3 on The Truth and Reconciliation.

Uncommon
24.0%last reported global rate
635
Go Ape Shiv

Halo 2: Kill an enraged, berserk Brute using melee.

Uncommon
24.2%last reported global rate
636
Dawn

Halo 4: Complete Dawn.

Uncommon
24.8%last reported global rate
637
Delta Halo

Halo 2: Complete Delta Halo.

Uncommon
24.8%last reported global rate
638
Cleansing

Halo 3: Complete Floodgate.

Uncommon
24.9%last reported global rate
639
A Crate of Medals

Collect 3,000 campaign or playlist medals.

Uncommon
25.2%last reported global rate
640
Oracle

Halo 2: Complete The Oracle.

Uncommon
25.2%last reported global rate