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