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