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.
(MP) Kill 100 people with mounted projectiles.
(MP) Perform 25 lance kills while mounted.
(MP) Kill 50 cavalry while on foot, the enemy must be killed while mounted.
(MP) Kill 50 foes with throwing axes.
(MP) Kill 25 people with throwing weapons.
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) Win in Conquest mode.
Land a shot with a difficulty of 6 while using a crossbow.
Steal 3 cattle from a single village.
(MP) Your team successfully defended a castle in siege battle mode.
As a female character, give a companion character a great sword.
Kill or wound at least 500 enemies.
Raid 3 caravans and raid 3 villages.
(MP) Win a round of deathmatch mode.
(MP) Slay 50 foes with slashing weapons.
Have two of the following skills at a 5; Trainer, Tactics, Leadership, or Persuasion.
You and your army have killed or wounded 5,000 enemy troops.
Have a -50 relation with a lord, village, or faction.
Enter and win a tournament.
Raise your soldiers' morale from low to excellent.
Get one of your healing skills to 5.
Recruit 6 hero characters.
Install and play one mod.
(MP) In any multiplayer mode have more kills than deaths.
(MP) Win a round of team deathmatch mode.
Visit every major town in Calradia.
Kill 10 parties of Mountain Bandits.
As a female character, raise your renown to 50.
Learn 3 poems from tavern bards.
(MP) Win one round in battle mode.
Face off against 100 enemies using custom battle mode.
Defeat 10 enemy parties in the snowy regions of Calradia.
Help a lord or party win a fight.
Finish reading one book through the camping screen.
Camp in the Sarranid region of the map.
Kill 50 men as a female character.
Sell 5 people to the ransom broker.
Cleanse the town of bandits in the opening mission.
Eat 6 different types food concurrently.
Harass wondering peasants on the map.
Engage in a conversation with a hero character through the party screen.
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.
Land a shot with a difficulty of 10 while using a bow and arrow.
Land a shot with a difficulty of 5 while using a throwing weapon.
Kill 10 enemies with a throwing weapon's secondary function.
Get either two strength related skills to 5 or one to 7.
Get either two agility related skills to 5 or one to 7.
Make one of your melee weapon skills 250.
Make one of your ranged weapon skills 250.
Have two of the following skills at a 5; Looting, Inventory Management, Trade, or Prisoner Management.
Have a 7 in one of the following skills or a 5 in two; Tracking, Path-finding, or Spotting.
Get the engineering skill up to 5.
Get Married.
Get a character to elope.
Be chosen as marshall.
Promote one of your followers into a position of power.
As a female character get into a duel with male lord by insulting him.
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.
Amass a fortune of 100,000 denars.
Be granted your first fief.
Become the owner of at least 5 fiefs.
Make your own faction.
Assist your faction in conquering Calradia.
As a ruler have 3 vassals.
As a ruler conquer 10 towns or castles.
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: 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, make your own faction.
As a female character, become queen of all Calradia.