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