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