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