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