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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.

281

Meddling and Madness

Halo: Reach: Find Data Pad 13 on Tip Of The Spear on Legendary difficulty

Very rare

2.30%last reported global rate

282

Skulltaker Halo: CE: Bandana

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

Very rare

2.30%last reported global rate

283

Skulltaker Halo: CE: Grunt Birthday Party

Halo CE: Find and claim the Grunt Birthday Party skull in remastered mode.

Very rare

2.30%last reported global rate

284

Thirsty Grunt

Halo CE: Listen to the Thirsty Grunt talk about his eating habits.

Very rare

2.30%last reported global rate

285

Babbling Dead

Halo 3: Activate Terminal 6 on The Covenant.

Very rare

2.40%last reported global rate

286

Boot Camp Hero

Halo 3: Complete a Halo 3 playlist.

Very rare

2.40%last reported global rate

287

He Never Gets Me Anything

Halo 2: Complete Delta Halo without entering a vehicle on Heroic or Legendary.

Very rare

2.40%last reported global rate

288

One For the Record Books

Halo: Reach: Beat the par time on New Alexandria.

Very rare

2.40%last reported global rate

289

Rex Sword

Halo 2: Grab the energy sword on the level Outskirts.

Very rare

2.40%last reported global rate

290

Scout

H3: ODST: Find the 21st Audio Log.

Very rare

2.40%last reported global rate

291

Terminal Conditions

Halo: Reach: Find Data Pad 8 on The Package

Very rare

2.40%last reported global rate

292

Unto Dust

Halo 3: Activate Terminal 5 on The Covenant.

Very rare

2.40%last reported global rate

293

Dogcatcher

Kill 1000 Crawlers.

Very rare

2.50%last reported global rate

294

I Dabble in Slaying

Complete one cross-game playlist.

Very rare

2.50%last reported global rate

295

Nagato Makes Moving Easy

H3: ODST: Complete all Halo 3: ODST Legendary campaign missions in under 3 hours.

Very rare

2.50%last reported global rate

296

Observant

H3: ODST: Find the 20th Audio Log.

Very rare

2.50%last reported global rate

297

Rampant Speculation

Halo: Reach: Find Data Pad 4 on Tip Of The Spear

Very rare

2.50%last reported global rate

298

Skulltaker Halo: CE: Malfunction

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

Very rare

2.50%last reported global rate

299

Thermopylae

Win 300 multiplayer games.

Very rare

2.50%last reported global rate

300

YOLO Strats

Halo 2: Beat the par time on The Arbiter.

Very rare

2.50%last reported global rate