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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.

541

Lord of Admirals

Halo 4: Activate Terminal 2 on Forerunner.

Rare

12.6%last reported global rate

542

Folks Need Heroes…

Halo: Reach: Complete every level of the game on Heroic difficulty.

Rare

12.8%last reported global rate

543

World Traveler

Halo 3: Complete a match on at least 8 different multiplayer maps.

Rare

12.8%last reported global rate

544

Boundless

Halo 2: Beat the par score on Delta Halo.

Rare

12.9%last reported global rate

545

Dambuster

Halo 3: Beat the par time on Floodgate.

Rare

12.9%last reported global rate

546

Enemies Everywhere!

Halo: Reach: Complete a Firefight set on Normal or Harder.

Rare

12.9%last reported global rate

547

Heresy Will Not Stay My Feet

Halo 2: Beat the par score on The Arbiter.

Rare

12.9%last reported global rate

548

Urban Warfare Badge

H3: ODST: Complete every level of the game on Normal difficulty.

Rare

12.9%last reported global rate

549

Wake Up Buttercup

Halo: Reach: Destroy the Corvette's engines & escort in under 3 minutes during Long Night of Solace

Rare

12.9%last reported global rate

550

Dankey Kang

Kill 1000 Brutes.

Rare

13.1%last reported global rate

551

He's Unstoppable

Halo CE: Complete any level on Heroic difficulty or higher without taking health damage.

Rare

13.1%last reported global rate

552

Naughty Naughty

Kill 10 Engineers.

Rare

13.2%last reported global rate

553

Hear Me Out

H3: ODST: Find the 5th Audio Log.

Rare

13.3%last reported global rate

554

A Day To Remember

Halo CE: Play Halo: CE on the 15th of any month.

Rare

13.4%last reported global rate

555

Examiner

Halo 2: Activate Terminal 3 on Metropolis.

Rare

13.5%last reported global rate

556

Librarian's Gift

Halo 4: Complete every level of the game on Easy difficulty.

Rare

13.5%last reported global rate

557

Jungle Warfare

Halo 4: Beat the par score on Infinity.

Rare

13.9%last reported global rate

558

Fascinated

Halo 2: Activate Terminal 5 on The Oracle.

Rare

14.0%last reported global rate

559

Flaming Ninja Anniversary

Halo 2A MP: Kill an opponent that has the Ninja Redux achievement in Anniversary matchmaking.

Rare

14.0%last reported global rate

560

Delighted

Halo 2: Activate Terminal 9 on Quarantine Zone.

Rare

14.1%last reported global rate