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