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