Here is the full list of all 80 Mount & Blade: Warband achievements. It takes around 150-200 hours to unlock all of the achievements on Windows.
As a female character, become queen of all Calradia.
Rule all of Calradia!
Make one of your melee weapon skills 250.
You have completed the following achievements: Melee Master, Knights of the Round, Every breath you take, I dub thee/Good Samaritan.
Kill 75 enemies with throwing weapons.
(MP) Kill 50 foes with throwing axes.
You have completed the following achievements: Might makes Right, The Huscarl, Melee Master/Dexterous Dastard, and Holy Diver/Elite Warrior.
(MP) Kill 50 cavalry while on foot, the enemy must be killed while mounted.
You have completed the following achievements: Mace in yer Face!, Spoil the Charge, Agile Warrior, and This is our land.
Get a character to elope.
Get Married.
Enter and win a tournament.
Put a pretender on their rightful throne.
As a female character, help a female claimant reclaim her throne.
(MP) Win in Conquest mode.
(MP) Kill 25 foes with a blunt weapon.
You have completed the following achievements: Abudant Feast, Mace in yer Face!, Sarranidian Nights, and Art of War/Melee Master.
(MP) Win a round of team deathmatch mode.
You have completed the following achievements: Might Makes Right, Choppy Chop Chop, Glorious Mother Faction, and Old school Sniper.
(MP) Win a round of deathmatch mode.
Learn 3 poems from tavern bards.
Finish reading one book through the camping screen.
As a ruler have 3 vassals.
Promote one of your followers into a position of power.
As a ruler conquer 10 towns or castles.
Make one of your ranged weapon skills 250.
As a female character, give a companion character a great sword.
Kill 10 parties of Mountain Bandits.
Have a 7 in one of the following skills or a 5 in two; Tracking, Path-finding, or Spotting.
Kill 10 enemies with a throwing weapon's secondary function.
Have two of the following skills at a 5; Looting, Inventory Management, Trade, or Prisoner Management.
As a female character, Capture and sell three NPC lords.
You have completed the following achievements: Trick Shot, Khaaan!, Agile Warrior, and Harassing Horseman.
Kill 75 enemies with horse archery.
Make your own faction.
As a female character, make your own faction.
Get either two agility related skills to 5 or one to 7.
Pick a fight with a lord by insulting him or by challenging him to a duel.
As a female character get into a duel with male lord by insulting him.
Kill 50 men as a female character.
Land a shot with a difficulty of 10 while using a bow and arrow.
As a female character, raise your renown to 50.
Assist your faction in conquering Calradia.
Recruit 6 hero characters.
Camp in the Sarranid region of the map.
(MP) Kill 100 people with mounted projectiles.
Visit every major town in Calradia.
Be chosen as marshall.
(MP) Kill 25 people with throwing weapons.
Raid 3 caravans and raid 3 villages.
Get either two strength related skills to 5 or one to 7.
Have two of the following skills at a 5; Trainer, Tactics, Leadership, or Persuasion.
Get the engineering skill up to 5.
Get one of your healing skills to 5.
Amass a fortune of 100,000 denars.
(MP) Slay 50 foes with slashing weapons.
(MP) Perform 25 lance kills while mounted.
Harass wondering peasants on the map.
Become the owner of at least 5 fiefs.
Defeat 10 enemy parties in the snowy regions of Calradia.
Engage in a conversation with a hero character through the party screen.
Successfully defend a castle.
You and your army have killed or wounded 5,000 enemy troops.
Land a shot with a difficulty of 5 while using a throwing weapon.
Win a battle against a lord or party who previously beat or captured you.
Be granted your first fief.
Raise your soldiers' morale from low to excellent.
Kill or wound at least 500 enemies.
Sell 5 people to the ransom broker.
Eat 6 different types food concurrently.
Have a -50 relation with a lord, village, or faction.
Steal 3 cattle from a single village.
Land a shot with a difficulty of 6 while using a crossbow.
Help a lord or party win a fight.
Install and play one mod.
Cleanse the town of bandits in the opening mission.
(MP) In any multiplayer mode have more kills than deaths.
(MP) Your team successfully defended a castle in siege battle mode.
(MP) Win one round in battle mode.
Face off against 100 enemies using custom battle mode.