Here is the full list of all 100 Knights of Honor II: Sovereign achievements.
Convert 100 provinces to your kingdom’s religion.
Win a game by becoming the Emperor of the World.
Own 5 trade centers at the same time.
Have 6 marshals at the same time in your royal court.
Top all 3 Society-related rankings at the same time.
Top all 3 Conquest-related rankings at the same time.
Organize a prison revolt.
Win the game.
Win a game by developing all advantages.
Make all Upgrades of a Royal Palace.
Top all 3 Wealth-related rankings at the same time.
Reach 400 commerce.
Make all Upgrades of a Trade Port.
Have the opinions of all society classes reach maximum values at the same time.
Make all Upgrades of a University or a Madrasah.
Make all Upgrades of a Cathedral or a Grand Mosque.
Fully develop an advantage.
Use all building slots in a town.
Produce Maps.
Have a cleric of yours become the Pope.
Reach the maximum level with all of your court knights.
Reach 100 levies income.
Reach 500 gold income from trade.
Lose a level 15 character.
Win a naval battle.
Reach 100 books income.
Fail an Emperor of the World claim.
Reach 100 piety/faith/tradition income.
Execute or assassinate a king.
Reach 150 food production.
Have one of your towns become a trade center.
Have your king lead a crusade.
Pillage 15 settlements in a single game.
Reach 200 gold income.
Help your knight escape from a dungeon by using a Spy.
Reach the maximum level with one of your knights.
Have your army killed by the arrows of a nearby town or castle.
Have 3 or more rebellions simultaneously.
Destroy a kingdom.
Start a war by sending or refusing a territorial claim.
Provoke war between two kingdoms with a Spy action.
Lead an alliance of at least 3 kingdoms.
Become a Great power.
Defeat a rebellion by force.
Hire knights in each slot of your royal court.
Overtake a foreign province.
Top a ranking.
Start a multiplayer game.
Have a non-Marshal (nor Shaman) knight lead an army.
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.
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.
Establish a colony.
Top all 3 Culture-related rankings at the same time.
Top all 3 Politics-related rankings at the same time.
Have the Ecumenical patriarch as a knight in your court.
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 Peasant’s Rush game by reaching the target kingdom’s size.
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.
Win a Grand Campaign in under 5 in-game hours.
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.
Initiate break siege with your king from within a town.
Become a vassal.
Declare independence while playing with Scotland.
Adopt Heroes and Battles beliefs.
Send gold to another kingdom while playing as Leinster.
Declare war on Salamanca.
Reach the west end of the known world.
Execute 10 prisoners in a single game.
Gain 20 provinces via diplomacy.
Conquer 250 provinces by force.
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.
Adopt Oceans and Raids beliefs.
Win a War for Goods game by producing the target amount of goods.