Full list of all 81 Crusader Kings III achievements worth 1,290 gamerscore.
The base game contains 67 achievements worth 1,000 Gamerscore, and there are 2 DLC packs containing 14 achievements worth 290 Gamerscore.
Gain a weak hook on any character, Gain strong hook on any character
Produce a new child
Construct any new building in your domain
Upgrade any existing building in your domain
Get married
Choose a Lifestyle and apply a Lifestyle Perk
Create a new Men-At-Arms regiment. Upgrade any Men-At-Arms regiment.
Replace an existing council member
Produce a child that has an inheritable trait
Start a scheme. Find a secret. Use a hook.
Have someone assassinated
Fabricate a claim
Declare War, Win a War and then Enforce your demands on the enemy.
Initiate and successfully form an alliance
Appoint a guardian to one of your children
Appoint a new Military Commander
Murder your spouse in a scheme
Create a faith
Change the appearance of your ruler using the Barbershop
Gain a strong hook on your Head of Faith
Create a Cadet Branch of your Dynasty
As Álmos Árpád of the Mogyër Confederation in 867, form Hungary and convert to Catholicism.
Gain the maximum amount of Dread (100)
Use a hook to modify a Feudal Contract
Increase your Rank by gaining a title that is a higher rank than your previous title
Gain a claim on a title using the Claim Throne Scheme.
As any Character, successfully Seduce 10 people
Gain a high enough Stress level to cause a Mental Breakdown
Starting as an Irish ruler, form the Kingdom of Ireland
Have 10 living children
Murder your lover's spouse
Reach the highest possible stress level
Obtain every perk in a Lifestyle
Seduce a character. Assassinate the character.
Complete any skill tree. Reset your perk points.
Complete an entire Dynasty Legacy path. Ironman Mode ON
Inherit a title from someone you Murdered. Ironman Mode ON
Go to war with one of your siblings over a Claim. Ironman Mode ON
Reach the highest possible Level of Fame. Ironman Mode ON
Know 10 secrets simultaneously. Ironman Mode ON
Take part in a successful Great Holy War. Ironman Mode ON
Completely Control the Kingdom of Thessalonika. Must be French. Ironman Mode ON
All Council Members have relevant skill levels of 20 or higher (excludes spouse). Ironman Mode ON
Win a civil war by defeating a Faction. Ironman Mode ON
Start as Rurik the Troublemaker, 867. Lead your Dynasty to rule the Russian Empire. Ironman Mode ON
Fully upgrade a Duchy Building anywhere in your personal Domain. Ironman Mode ON
Found a Holy Order. Ironman Mode ON
As Duke William of Normandy in 1066, subjugate England. Ironman Mode ON
As Duke Vratislav Přemyslid of Bohemia, 1066, rule Bohemia & the Holy Roman Empire. Ironman Mode ON
Reach the highest possible Level of Devotion (max Piety). Ironman Mode ON
As a Hindu, own or become the Liege of all seven Hindu Holy Sites. Ironman Mode ON
While holding any Empire Title, be naked. Ironman Mode ON
Have strong hooks on three Direct Vassals. Ironman Mode ON
Reach the highest possible Level of Splendor for your Dynasty. Ironman Mode ON
Take the 'Avenge the Battle of Tours' decision and completely control Iberia. Ironman Mode ON
Unlock all Innovations (excluding regional and culture-specific innovations). Ironman Mode ON
As Count Eudes Robertine of Anjou, 867, your Dynasty rules the Kingdom of France. Ironman Mode ON
As Duke Nuño of Portucale in 1066, form Portugal. Ironman Mode ON
Play until 1453. Ironman Mode ON
Have three or more Virtuous Traits. Ironman Mode ON
Have 100 living Dynasty members. Ironman Mode ON
Control the Iberia region and ensure all associated counties are Christian. Ironman Mode ON
Use a hook to help you win an Election. Ironman Mode ON
As Daurama Daura of Kano, 867, reform a pagan faith & convert all local Counties. Ironman Mode ON
Restore the Roman Empire. Ironman Mode ON
Have your Dynasty rule 10 sovereign realms of at least Kingdom tier simultaneously. Ironman Mode ON
Complete all achievements
As a dwarf, win a Varangian Adventurer war anywhere outside of Europe. Ironman Mode On.
As a Norse-Asatru ruler, have your capital on any island in the Indian Ocean. Ironman Mode On.
As a North Germanic Asatruan, convert yourself and all of Russia to Islam. Ironman Mode On.
As an unreformed tribal, form the North Sea Empire. Ironman Mode On.
As a Norse tribal, control the entirety of Sicily before 1047. Ironman Mode On.
As an Asatru, hold the kingdom of Thessalonika with a title other than Byzantium. Ironman Mode On.
As a North Germanic Asatruan, control all Atlantic and Mediterranean islands. Ironman Mode On.
Create a Divergent Culture. Ironman Mode On.
Create a Hybrid Culture. Ironman Mode On.
Reach the maximum amount of Court Grandeur. Ironman Mode On.
Obtain a mythological rarity artifact from an Adventurer Inspiration. Ironman Mode On.
As a member of the Pugyel Dynasty, re-create the Empire of Tibet. Ironman Mode On.
As the Seljuk Count in Samosata, own Rum and a Hybrid culture of Oghuz and Greek. Ironman Mode On.
Have every Royal Court speak your Court Language. Ironman Mode On.