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