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