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