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