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