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