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