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Sins of a Solar Empire II Achievements

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

Total achievements72
Rarest rate0.200%
Ultra rare7
Last checkedSep 16, 2026
Delayed official data

Rates and award counts were last observed on Sep 16, 2026.

1
Unlikely Allies Revealed

Get a synergy pact with an Eidolon player as the Advent Wrath.

Ultra rare
0.200%last reported global rate
2
Portal Nexus

Have 10 Minor or Major Portals on a single planet.

Ultra rare
0.300%last reported global rate
3
The Predator Becomes the Prey

Defeat an Eidolon player as the Vasari.

Ultra rare
0.400%last reported global rate
4
Combat Jump

Teleport the Eidolon Starbase into hostile territory.

Ultra rare
0.700%last reported global rate
5
Systemic Corruption

Corrupt and shroud 25 planets during a single match.

Ultra rare
0.700%last reported global rate
6
Against All Odds

Eliminate an Eidolon as the TEC.

Ultra rare
0.800%last reported global rate
7
Military Intelligence

Research all military and no civilian topics; and win the game.

Ultra rare
0.800%last reported global rate
8
An Ancient Enemy Returns

Defeat a Vasari Alliance or Exodus Opponent as Eidolon.

Very rare
1.70%last reported global rate
9
Dust and Echoes

Strip to the core 30 planets in one game.

Very rare
1.80%last reported global rate
10
Don't Fix What Never Broke

Equip 3 planet artifacts at one time on the same planet.

Very rare
2.00%last reported global rate
11
Fear of Icebergs

Win a match without using capital ships.

Very rare
2.00%last reported global rate
12
Privateer

Control 500 supply of Pirate ships.

Very rare
2.00%last reported global rate
13
Go Big or Go Home

Win a match only building capital ships.

Very rare
2.20%last reported global rate
14
Harbinger Foothold

Win as the Eidolon.

Very rare
2.30%last reported global rate
15
There Can Be Only One

Kill off 5 different minor factions on the same map.

Very rare
2.60%last reported global rate
16
Spin A-Round, Round, Round, Round…

Shift the orbital structures in your empire on 10 different planets in a single game.

Very rare
3.40%last reported global rate
17
Breaching The Unbreachable

Kill the Pranast United.

Very rare
4.20%last reported global rate
18
Never Gamble With a Telepath.

Buy 100,000 crystal.

Very rare
4.20%last reported global rate
19
Enough... Is Never Enough

Sell 100,000 crystal.

Very rare
4.30%last reported global rate
20
Get Off My Lawn

Kill off the Viturak Cabal.

Very rare
4.30%last reported global rate