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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.

21
Parting Gifts

Find all skulls and terminals in Heavy Burden.

Rare
10.7%last reported global rate
22
Priorities

Find all skulls and terminals in Keyes.

Rare
10.7%last reported global rate
23
Brute Loops

Find all skulls and terminals in The Most Dangerous Game.

Rare
10.9%last reported global rate
24
Souvenirs

Find all skulls and terminals in Boarding Action.

Rare
11.7%last reported global rate
25
No Rush

Find all skulls and terminals in The Maw.

Rare
12.3%last reported global rate
26
Outpost Discoveries

Find all skulls and terminals in Two Betrayals.

Rare
14.0%last reported global rate
27
Timeless Tomes

Find all skulls and terminals in The Library.

Rare
14.9%last reported global rate
28
Plundered

Find all skulls and terminals in Truth and Reconciliation.

Rare
15.7%last reported global rate
29
Proto Gravemind

Find all skulls and terminals in 343 Guilty Spark.

Rare
16.1%last reported global rate
30
Stowed in Snow

Find all skulls and terminals in Assault on the Control Room.

Rare
16.3%last reported global rate
31
Successful Search

Find all skulls and terminals in Halo.

Rare
17.1%last reported global rate
32
Heroes Never Die

Complete the Campaign on Heroic Difficulty.

Rare
17.9%last reported global rate
33
Making a Necklace

Collect 22 Skulls.

Rare
18.2%last reported global rate
34
Buried Treasure

Find all skulls and terminals in Silent Cartographer.

Uncommon
20.2%last reported global rate
35
Clean Lap

On The Maw complete the warthog run without being forcibly ejected from your vehicle.

Uncommon
20.5%last reported global rate
36
Clean Sweep

Find all skulls and terminals in Pillar of Autumn.

Uncommon
22.9%last reported global rate
37
Birth of a Spartan

Complete the Campaign on Normal Difficulty.

Uncommon
29.1%last reported global rate
38
Greenhorn

Complete the Campaign on Easy Difficulty.

Uncommon
31.5%last reported global rate
39
Personal Space

Complete Heavy Burden.

Uncommon
35.7%last reported global rate
40
Dust & Echoes Evolved

Complete The Maw.

Uncommon
36.3%last reported global rate