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