Full list of all 102 Galactic Civilizations III achievements. It takes around 200 hours to unlock all of the achievements in the base game on Windows.
The base game contains 62 achievements, and there are 7 DLC packs containing 40 achievements.
Win as Xraki
Win as Measured
Win as Phamysht
Win as Scryve
Use 20 Artifact Powers in a single game
Build 20 hyperlanes in a single game
Win as Mowlings
Win as the Mu'Kay
Win as Drath
Win as Korath
Use the spore weapon
Win as the Tywom
Win as Free Trandals
Win the Retribution campaign
Build a hyperlane
Build a hypergate
Use an Artifact Power
Play for 1000 Hours
Use Core Detonation invasion 10 times in one game
Be at war with 5 different factions at the same time
Win on an Insane sized map
Unlock all the Malevolent ideology traits
Have 12 or more Trade Routes
Win as the Iridium
Win as the Thalan
Unlock all the Benevolent ideology traits
Ascension victory
Unlock all the Pragmatic ideology traits
Win as the Krynn
Technology Victory
Win as the Altarian
Win by Diplomacy
Win the campaign
Ally with first other major faction
Win as the Yor
Destroy more than 7 Pirate bases
Destroy the Iconian faction, as the Yor
Declare war before you have Universal Translator
Win as the Drengin
Own 30 planets
Play for 100 hours across all games
Use a Worm Hole
Start the campaign
Destroy more than 15 enemy ships in a battle
Win as a Custom Faction
Win as the Iconian
Win by Cultural Influence
As the Iconians, take back Iconia (Yor's starting homeworld) from the Yor
Survey an anomaly in a dust cloud or nebula
Win as the Terran
Win by Conquest
Win a game in under 200 turns
Destroy an Enemy Faction
Collect 15 Anomalies in a game
Play for 5 hours across all games
Control all Relics on the map
Meet your first Race in Galactic Civilizations III
Create your first ship design
Win a Battle
Colonize your first planet
Win in Multiplayer
Recapture your homeworld
Win as Snathi
Complete the Snathi Campaign
Win as Arceans
Win as Torians
Complete the Mercenaries campaign
Complete "Rogue General" Crisis
Complete "Apophis" Crisis
Successfully complete a Crisis
Complete "The Revolution" Crisis
Create a commonwealth
Raise your taxes to 100% for one turn
Assign a Crisis manager
Buy at least 30 resources at once
Sell at least 30 resources at once
Complete "The Simulation" Crisis
Complete "Secession" Crisis
Win an Election with a landslide majority
Complete "Brain Parasites" Crisis
Sell at least 10 resources at once
Sell at least one resource on the marketplace
Complete "Space Monster" Crisis
Buy at least 10 resources at once
Buy at least one resource on the marketplace
Complete "Brain Trust" Crisis
Change your government type
Win an Election
Form a government
Change your tax slider for one turn
Lower your taxes to 0% for one turn
Win Game playing the Onyx Hive.
Unleash a custom Civilization on the Galaxy.
Win Game playing the Slyne.
Win Game playing the Terran Resistance.
Conquer a planet defended by enemy Legions.
Place a spy on a foreign colony.
Promote your first Specialist.
Complete the Crusade Tutorial.
Train your first Citizen.
Complete the Altarian Prophecy Campaign
Complete the Rise of the Terrans campaign