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