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