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