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