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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.

1

Back for More

Halo 2: Complete the LASO campaign playlist.

Ultra rare

0.500%last reported global rate

2

LASO Master

Complete each individual game specific LASO playlist for every Halo game.

Ultra rare

0.500%last reported global rate

3

Monopolized

Halo 2: Complete all Halo 2 Legendary campaign missions in under 3 hours.

Ultra rare

0.500%last reported global rate

4

Roadkill Rampage

Halo 2A MP: In Anniversary matchmaking, earn a total of 100 Splatter medals.

Ultra rare

0.500%last reported global rate

5

Rock and Coil Hit Back

Halo 2A MP: In Anniversary matchmaking, earn a total of 100 Environmentalist medals.

Ultra rare

0.500%last reported global rate

6

A Preference for Pain

Halo 3: Complete the Halo 3 LASO Campaign playlist.

Ultra rare

0.600%last reported global rate

7

Déjà Vu

H3: ODST: Complete Coastal Highway on 4-player Legendary co-op, with Iron, and no 'Hog or Scorpion.

Ultra rare

0.600%last reported global rate

8

Goat Roped

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

Ultra rare

0.600%last reported global rate

9

Like a Fine Wine

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

Ultra rare

0.600%last reported global rate

10

Naked Tyrant

Halo 4: Complete the Halo 4 LASO Campaign playlist.

Ultra rare

0.600%last reported global rate

11

Remove the Bishops From the Board

Kill 1000 Watchers.

Ultra rare

0.600%last reported global rate

12

Safety Not Guaranteed

H3: ODST: Complete a Halo 3: ODST LASO Campaign playlist.

Ultra rare

0.600%last reported global rate

13

You're Joking

Halo 4: Complete all Halo 4 Legendary campaign missions in under 3 hours.

Ultra rare

0.600%last reported global rate

14

Airborne

Halo CE: Launch a Warthog for at least 5 seconds and have it splatter an enemy.

Ultra rare

0.700%last reported global rate

15

Annual

Halo 3: Complete Halo on 4-player Legendary co-op, with Iron Skull, and everyone in Ghosts.

Ultra rare

0.700%last reported global rate

16

Devotee

Halo 4: Complete three Halo 4 playlists.

Ultra rare

0.700%last reported global rate

17

Elder Signs

Halo 3: View 2 different sigils on Valhalla.

Ultra rare

0.700%last reported global rate

18

Icarus

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

Ultra rare

0.700%last reported global rate

19

Invaders Repelled

Halo 2A MP: In King of the Hill, kill 5 opponents within your controlled hill.

Ultra rare

0.700%last reported global rate

20

Knightbane

Kill 1000 Knights.

Ultra rare

0.700%last reported global rate