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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.

21
Look Out for the Little Guys

Halo CE: Complete Two Betrayals on Legendary difficulty without killing any Grunts.

Ultra rare
0.700%last reported global rate
22
Mind the Gap

Halo 3: 4 vehicles, 1 gap on Legendary using Cowbell, Catch, Thunderstorm, Mythic, and Tough Luck.

Ultra rare
0.700%last reported global rate
23
No One Left Behind

Halo 4: Save at least one Marine on Hacksaw (Ep.2 Ch.3) of Spartan Ops on Heroic or Legendary.

Ultra rare
0.700%last reported global rate
24
One Final Firefight

Halo: Reach: Achieve a score of 150,000 points on Lone Wolf.

Ultra rare
0.700%last reported global rate
25
Smooth Operator

Halo 4: Complete all Spartan Ops chapters solo on Legendary difficulty.

Ultra rare
0.700%last reported global rate
26
The True King

Earn a total of 250 KOTH Mode Specific medals in matchmade games.

Ultra rare
0.700%last reported global rate
27
Why Do This To Yourself?

Halo: Reach: Complete the Halo: Reach LASO Campaign playlist.

Ultra rare
0.700%last reported global rate
28
Bros to the Close

Halo 4: Complete Infinity without one preventable Marine death on Heroic or Legendary.

Ultra rare
0.800%last reported global rate
29
Catch This

Earn a total of 500 Grenade Kill or Plasma Kill medals in matchmade games.

Ultra rare
0.800%last reported global rate
30
Connoisseur

Halo 2: Complete three Halo 2 playlists.

Ultra rare
0.800%last reported global rate
31
Destination Vacation

Halo 2: View one of the seasonal signs on Zanzibar in classic multiplayer.

Ultra rare
0.800%last reported global rate
32
Devastating

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

Ultra rare
0.800%last reported global rate
33
Easy As One Two Three

Halo 4: Beat the par time on all Halo 4 levels.

Ultra rare
0.800%last reported global rate
34
Hazard Pay

Halo 4: Complete all Spartan Ops chapters on Heroic difficulty.

Ultra rare
0.800%last reported global rate
35
Mortardom

Halo 4: On Reclaimer, use a Wraith to kill at least four enemy Wraiths on Heroic or Legendary.

Ultra rare
0.800%last reported global rate
36
No Easy Way Out

Halo 4: Survive Spartan Miller (Ep.5 Ch.1) of Spartan Ops on Heroic or Legendary.

Ultra rare
0.800%last reported global rate
37
Shiny...

H3: ODST: Pilot a Banshee on Kizingo Boulevard.

Ultra rare
0.800%last reported global rate
38
The Return of Megg

Halo 2: She's not picking up.

Ultra rare
0.800%last reported global rate
39
Trifecta

H3: ODST: Complete three Halo 3: ODST playlists.

Ultra rare
0.800%last reported global rate
40
Wetwork

Halo 2A MP: On Shrine in CTF, activate the enemy base waterfall and, before it stops, grab the flag.

Ultra rare
0.800%last reported global rate