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