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