Back to Halo: The Master Chief Collection

Steam

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.

581

Reclaimer

Halo 4: Complete Reclaimer.

Rare

16.5%last reported global rate

582

NMPD HQ

H3: ODST: Complete NMPD HQ.

Rare

16.6%last reported global rate

583

T'vaoan Terminator

Halo: Reach: Kill 100 Skirmishers.

Rare

16.6%last reported global rate

584

Bloodhound

H3: ODST: Find the 4th clue unraveling the mystery.

Rare

16.9%last reported global rate

585

Deference of Darkness

H3: ODST: Complete any level without activating VISR mode.

Rare

17.0%last reported global rate

586

ONI Alpha Site

H3: ODST: Complete ONI Alpha Site.

Rare

17.1%last reported global rate

587

Prophet's Bane

Halo 3: Complete every level of the game on Normal difficulty.

Rare

17.2%last reported global rate

588

A Few Trinkets

Collect 5,000 campaign or playlist medals.

Rare

17.5%last reported global rate

589

Big Green Style

Halo 2: Complete every level of the game on Easy difficulty.

Rare

17.5%last reported global rate

590

Remember Reach

Halo: Reach: Play a game of Halo: Reach on the 14th of any month.

Rare

17.7%last reported global rate

591

Kizingo Boulevard

H3: ODST: Complete Kizingo Blvd.

Rare

17.8%last reported global rate

592

Gumshoe

H3: ODST: Find the 3rd clue unraveling the mystery.

Rare

17.9%last reported global rate

593

Infinity

Halo 4: Complete Infinity.

Rare

18.0%last reported global rate

594

An Ear Full

H3: ODST: Find the 2nd Audio Log.

Rare

18.1%last reported global rate

595

Were It So Easy

Kill 1000 Elites.

Rare

18.1%last reported global rate

596

Didn't Like This Ship Anyways

Halo CE: Beat the par time on The Pillar of Autumn.

Rare

18.2%last reported global rate

597

Idle Hands

Halo CE: Activate Terminal 4 on The Silent Cartographer.

Rare

18.3%last reported global rate

598

Scavenger Hunt

Kill 1000 Jackals.

Rare

18.6%last reported global rate

599

Bip! Bap! BAM!

H3: ODST: Earn a Triple Kill medal with the pistol on any level.

Rare

18.7%last reported global rate

600

Forerunner

Halo 4: Complete Forerunner.

Rare

19.1%last reported global rate