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