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