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