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Nuclear Design Bureau Achievements

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

Total achievements11
Rarest rate26.8%
Ultra rare0
Last checkedOct 11, 2026
Delayed official data

Rates and award counts were last observed on Oct 11, 2026.

1
King of Bombs

Complete the final Tsar Bomba directive.

Uncommon
26.8%last reported global rate
2
Cold Warrior

Complete 10 Directives.

Uncommon
39.3%last reported global rate
3
The Fizzle

Start a supercritical chain reaction that ends below 0.05 kilotons.

Uncommon
46.1%last reported global rate
4
Megaton Club

Reach 1 Megaton total yield.

Uncommon
47.3%last reported global rate
5
Precision Engineer

Complete Compression Qualification.

Common
51.1%last reported global rate
6
Hydrogen Age

Produce at least 0.10 kilotons of fusion yield in one run.

Common
52.1%last reported global rate
7
Hero of Labor

Consume at least 20% of the initial fissile inventory in one run.

Common
54.1%last reported global rate
8
First Light

Initiate your first nuclear chain reaction.

Common
88.2%last reported global rate
9
Unstoppable Chain

Reach a confirmed k-effective of at least 1.2.

Common
88.5%last reported global rate
10
Critical Mass

Reach a confirmed k-effective of at least 1.0.

Common
88.9%last reported global rate
11
State Servant

Complete your first directive.

Common
92.5%last reported global rate