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