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