Here is the full list of all 100 Knights of Honor II: Sovereign achievements.
Send gold to another kingdom while playing as Leinster.
Initiate break siege with your king from within a town.
Have your king lead a crusade.
Win a game by developing all advantages.
Establish a colony.
Make all Upgrades of a Royal Palace.
Lead an alliance of at least 3 kingdoms.
Reach the maximum level with all of your court knights.
Reach 100 piety/faith/tradition income.
Reach 400 commerce.
Have the Ecumenical patriarch as a knight in your court.
Make all Upgrades of a Trade Port.
Top all 3 Conquest-related rankings at the same time.
Make all Upgrades of a Cathedral or a Grand Mosque.
Have the opinions of all society classes reach maximum values at the same time.
Use all building slots in a town.
Make all Upgrades of a University or a Madrasah.
Reach 150 food production.
Reach 100 books income.
Execute or assassinate a king.
Top all 3 Wealth-related rankings at the same time.
Produce Maps.
Have a non-Marshal (nor Shaman) knight lead an army.
Win a game by becoming the Emperor of the World.
Win a Grand Campaign in under 5 in-game hours.
Fully develop an advantage.
Reach 500 gold income from trade.
Reach 100 levies income.
Help your knight escape from a dungeon by using a Spy.
Lose a level 15 character.
Fail an Emperor of the World claim.
Have a cleric of yours become the Pope.
Reach the maximum level with one of your knights.
Have one of your towns become a trade center.
Destroy a kingdom.
Win the game.
Win a Peasant’s Rush game by reaching the target kingdom’s size.
Start a war by sending or refusing a territorial claim.
Reach 200 gold income.
Hire knights in each slot of your royal court.
Top a ranking.
Defeat a rebellion by force.
Overtake a foreign province.
Become a Great power.
Pillage 15 settlements in a single game.
Start a multiplayer game.
Organize a prison revolt.
Provoke war between two kingdoms with a Spy action.
Declare war on a kingdom with which you’ve signed a non-aggression pact.
Support another player in a battle.
Claim independence.
Instigate a crusade.
Defeat a crusader army marching against you.
Destroy the kingdom of another player.
Participate in a battle, in which 3 other kingdoms are involved.
Win a naval battle.
Pick a new kingdom in a multiplayer game after your first one was destroyed.
Assassinate a knight of another player with a Spy.
Have an army reach 7,000 manpower.
Complete a Scholar’s journey.
Top all 3 Culture-related rankings at the same time.
Top all 3 Society-related rankings at the same time.
Top all 3 Politics-related rankings at the same time.
Establish a caliphate.
Claim autocephaly.
Destroy the Papacy.
Have at least 3 pagan beliefs promoted at the same time.
Win a Grand Campaign after starting with a single-province-sized kingdom.
Win a Greedy Kings game by collecting the target amount of gold.
Win Destroy kingdom by destroying the target kingdom.
Win a “First blood” game by destroying an opponent.
Top all rankings at the same time.
Own 100 provinces.
Hold Constantinople, Mecca and Rome at the same time.
Change your kingdom's religion twice in a single game.
Refuse peace offer when you have only one town, that is being besieged.
Become a vassal.
Declare independence while playing with Scotland.
Adopt Heroes and Battles beliefs.
Declare war on Salamanca.
Reach the west end of the known world.
Have your army killed by the arrows of a nearby town or castle.
Execute 10 prisoners in a single game.
Own 5 trade centers at the same time.
Gain 20 provinces via diplomacy.
Conquer 250 provinces by force.
Convert 100 provinces to your kingdom’s religion.
Pillage 100 settlements.
Actively end disorder in 200 provinces.
Win 1000 battles.
Destroy 50 kingdoms.
Using a diplomat, improve your relations with other kingdoms 1,000 times.
Sign 50 trade agreements.
Vassalize 50 kingdoms.
Bribe 100 knights.
Import 20 goods.
Have 6 marshals at the same time in your royal court.
Adopt Oceans and Raids beliefs.
Have 3 or more rebellions simultaneously.
Win a War for Goods game by producing the target amount of goods.