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