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