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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.

301
Game Master

Created and saved 5 Custom Game types.

Very rare
2.60%last reported global rate
302
HBOrg Special

Halo: Reach: Party with the DJ Brute.

Very rare
2.60%last reported global rate
303
Skulltaker Halo 3: IWHBYD

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

Very rare
2.60%last reported global rate
304
Watchful

H3: ODST: Find the 19th Audio Log.

Very rare
2.60%last reported global rate
305
Bearly Contained

Halo CE: Activate Terminal 6 on 343 Guilty Spark.

Very rare
2.70%last reported global rate
306
Circuit Breaker

Halo CE: Beat the par score on 343 Guilty Spark.

Very rare
2.70%last reported global rate
307
Reach Has Been Good to Me

Halo: Reach: Complete a Halo: Reach playlist.

Very rare
2.70%last reported global rate
308
Those Left Behind

H3: ODST: Finish Tayari Plaza with at least one Marine still breathing.

Very rare
2.70%last reported global rate
309
Attentive

H3: ODST: Find the 18th Audio Log.

Very rare
2.80%last reported global rate
310
Blown Out of the Sky

Halo 2A MP: Blow up the Banshee or Hornet in flight while piloted, with the Rocket Launcher.

Very rare
2.80%last reported global rate
311
Charted

Halo CE: Beat the par score on The Silent Cartographer.

Very rare
2.80%last reported global rate
312
Clear and Present Danger

Halo: Reach: Pad on the run.

Very rare
2.80%last reported global rate
313
Cool Story Bro

Halo 3: Listen to the story of the Final Grunt.

Very rare
2.80%last reported global rate
314
It Was Inevitable

Halo CE: Beat the par score on Two Betrayals.

Very rare
2.80%last reported global rate
315
Lightning Strike

Halo 3: Beat the par time on The Storm.

Very rare
2.80%last reported global rate
316
Skulltaker Halo 3: Cowbell

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

Very rare
2.80%last reported global rate
317
Unreliable Narrator

Halo: Reach: Find Data Pad 10 on Winter Contingency on Legendary difficulty

Very rare
2.80%last reported global rate
318
Walk It Off

Halo CE: Complete The Pillar of Autumn on Legendary without picking up a health kit.

Very rare
2.80%last reported global rate
319
Battle Hardened

Win 250 multiplayer games.

Very rare
2.90%last reported global rate
320
Before the Fire

Halo 3: Activate Terminal 3 on The Ark.

Very rare
2.90%last reported global rate