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