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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.

361

Needs More Whammy Bar

Halo 2: Complete the level Regret with the Prophet Birthday Skull activated.

Very rare

3.60%last reported global rate

362

Rooftop Runner

Halo 2: Beat the par time on Outskirts.

Very rare

3.60%last reported global rate

363

Siege of Ivory Tower

Halo 2: Listen to a hidden music cue in Halo 2.

Very rare

3.60%last reported global rate

364

Skulltaker Halo: CE: Eye Patch

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

Very rare

3.60%last reported global rate

365

Spree Master

Earn a total of 100 Killing Spree medals in matchmade games.

Very rare

3.60%last reported global rate

366

Determined

Halo 2: Activate Terminal 8 on Sacred Icon.

Very rare

3.70%last reported global rate

367

Skulltaker Halo: CE: Recession

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

Very rare

3.70%last reported global rate

368

Dark Fortress

Halo 4: Beat the par score on Requiem.

Very rare

3.80%last reported global rate

369

Meeting of the (Artificial) Minds

Halo: Reach: Find Data Pad 3 on Nightfall

Very rare

3.80%last reported global rate

370

No-Fly Zone

Halo CE: Destroy three of the four Banshees on Halo during a single play-through.

Very rare

3.80%last reported global rate

371

Parting the Sea

Halo: Reach: Beat the par score on Exodus.

Very rare

3.80%last reported global rate

372

Snoop Troop

H3: ODST: Find the 14th Audio Log.

Very rare

3.80%last reported global rate

373

Tour of Duty

Halo 2A MP: Complete a game in every one of the 6 updated Anniversary MP maps.

Very rare

3.80%last reported global rate

374

Catch 'Em Napping

H3: ODST: Kill 5 sleeping Grunts on Mombasa Streets.

Very rare

3.90%last reported global rate

375

Orpheus

Halo 3: Beat the par score on Cortana.

Very rare

3.90%last reported global rate

376

Put Up Your Dukes

Halo 2A MP: Get 25 melee kills in multiplayer.

Very rare

3.90%last reported global rate

377

Official Business

Halo 2: Beat the par score on Gravemind.

Very rare

4.00%last reported global rate

378

Primate

Halo 3: Find your first missing links.

Very rare

4.00%last reported global rate

379

Collection Eligibility Confirmed

Halo: Reach: See, he IS in the game!

Very rare

4.10%last reported global rate

380

Flipyap

Halo 3: Listen to the tale of a young Grunt named Flipyap.

Very rare

4.10%last reported global rate