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