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Halo: Campaign Evolved Achievements

Official Steam achievement definitions and latest reported global unlock rates, ordered from rarest to most common.

Total achievements58
Rarest rate1.60%
Ultra rare0
Last checkedSep 23, 2026
Delayed official data

Rates and award counts were last observed on Sep 23, 2026.

41
Tiger Company

Complete The Most Dangerous Game.

Uncommon
39.7%last reported global rate
42
Bad Gas

Destroy 100 Grunt backpacks.

Uncommon
43.3%last reported global rate
43
Before the Fall

Complete Boarding Action.

Uncommon
43.3%last reported global rate
44
Captain’s Orders

Complete Keyes.

Uncommon
44.8%last reported global rate
45
Double Trouble

Complete Two Betrayals.

Uncommon
45.8%last reported global rate
46
Plate Tectonics

Break off 25 Hunter backplates.

Uncommon
46.0%last reported global rate
47
That’s My Ride

On Assault on the Control Room get to the Banshee before the Elite.

Uncommon
49.1%last reported global rate
48
Protocol Dictates Action

Complete The Library.

Common
51.0%last reported global rate
49
Disarmed

Dismember 100 Flood parts.

Common
52.7%last reported global rate
50
Control Alt Delete

Complete Assault on the Control Room.

Common
53.6%last reported global rate
51
This Stuff is Your History

Complete 343 Guilty Spark.

Common
53.7%last reported global rate
52
Bee Thirty

Complete Silent Cartographer.

Common
62.2%last reported global rate
53
Infiltration Anticipation

Complete Truth and Reconciliation.

Common
64.1%last reported global rate
54
Claims Adjuster

Break off 50 Vehicle parts.

Common
66.7%last reported global rate
55
Cranial

Collect a Skull.

Common
70.5%last reported global rate
56
Installation 04

Complete Halo.

Common
77.5%last reported global rate
57
Make Them Count

Kill 100 enemies with headshots.

Common
78.4%last reported global rate
58
The Autumn Leaves

Complete Pillar of Autumn.

Common
85.9%last reported global rate