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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.

341
What About Those Tanks?

H3: ODST: Destroy 7 Wraiths on Oni Alpha Site.

Very rare
3.20%last reported global rate
342
Wyrmslayer

Kill 250 Hunters.

Very rare
3.20%last reported global rate
343
Justice

Halo 4: Activate Terminal 6 on Composer.

Very rare
3.30%last reported global rate
344
Time Shift

Halo 3: Beat the par time on Crow's Nest.

Very rare
3.30%last reported global rate
345
A Monument To All Your Sins

Halo: Reach: Complete every level of the game on Legendary difficulty, by yourself.

Very rare
3.40%last reported global rate
346
Ninja Redux

Halo 2A MP: Kill 5 people with melee from behind in Anniversary matchmaking.

Very rare
3.40%last reported global rate
347
Skulltaker Halo: CE: Boom

Halo CE: Find and claim the Boom skull in remastered mode.

Very rare
3.40%last reported global rate
348
The Legend of 117

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

Very rare
3.40%last reported global rate
349
All Ears

H3: ODST: Find the 15th Audio Log.

Very rare
3.50%last reported global rate
350
Digital Destinies

Halo: Reach: Find Data Pad 9 on The Pillar Of Autumn

Very rare
3.50%last reported global rate
351
In It To Win It

Win 200 multiplayer games.

Very rare
3.50%last reported global rate
352
Knights

Halo 4: Activate Terminal 5 on Shutdown.

Very rare
3.50%last reported global rate
353
Leave None Alive

Halo 2: Beat the par score on The Oracle.

Very rare
3.50%last reported global rate
354
No Man's Land

Halo 2: Beat the par time on Uprising.

Very rare
3.50%last reported global rate
355
Quis custodiet ipsos custodes?

Halo CE: Activate Terminal 7 on The Library.

Very rare
3.50%last reported global rate
356
Read Halsey's Journal

Halo: Reach: Find Data Pad 2 on ONI: Sword Base

Very rare
3.50%last reported global rate
357
Skulltaker Halo 3: Famine

Halo 3: Find and claim the Famine Skull on Normal or harder.

Very rare
3.50%last reported global rate
358
Tipping Point

Halo 3: Activate Terminal 4 on The Covenant.

Very rare
3.50%last reported global rate
359
Giant Hula Hoop

Halo CE: Beat the par score on Halo.

Very rare
3.60%last reported global rate
360
Give Him the Stick

Halo 4: Take out both Hunters using only the Sticky Detonator on Composer.

Very rare
3.60%last reported global rate