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.
Rule all of Calradia!
Get a character to elope.
Promote one of your followers into a position of power.
As a ruler conquer 10 towns or castles.
As a ruler have 3 vassals.
Make your own faction.
As a female character, make your own faction.
Assist your faction in conquering Calradia.
As a female character, become queen of all Calradia.
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.
Win a battle against a lord or party who previously beat or captured you.
Make one of your ranged weapon skills 250.
You have completed the following achievements: Might makes Right, The Huscarl, Melee Master/Dexterous Dastard, and Holy Diver/Elite Warrior.
Steal 3 cattle from a single village.
Raid 3 caravans and raid 3 villages.
Put a pretender on their rightful throne.
As a female character, help a female claimant reclaim her throne.
Become the owner of at least 5 fiefs.
Have a 7 in one of the following skills or a 5 in two; Tracking, Path-finding, or Spotting.
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.
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.
Amass a fortune of 100,000 denars.
Finish reading one book through the camping screen.
Learn 3 poems from tavern bards.
Kill 75 enemies with throwing weapons.
Get the engineering skill up to 5.
Get one of your healing skills to 5.
Kill 10 enemies with a throwing weapon's secondary function.
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.
Get Married.
Be chosen as marshall.
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.
(MP) Kill 50 foes with throwing axes.
(MP) Kill 25 people with throwing weapons.
(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: Abudant Feast, Mace in yer Face!, Sarranidian Nights, and Art of War/Melee Master.
(MP) Kill 25 foes with a blunt weapon.
(MP) Slay 50 foes with slashing weapons.
(MP) Win one round in battle mode.
(MP) Win in Conquest 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) Your team successfully defended a castle in siege battle mode.
Have a -50 relation with a lord, village, or faction.
As a female character, Capture and sell three NPC lords.
Face off against 100 enemies using custom battle mode.
Harass wondering peasants on the map.
Have two of the following skills at a 5; Trainer, Tactics, Leadership, or Persuasion.
Successfully defend a castle.
You and your army have killed or wounded 5,000 enemy troops.
Land a shot with a difficulty of 5 while using a throwing weapon.
Be granted your first fief.
Kill 75 enemies with horse archery.
Kill 10 parties of Mountain Bandits.
As a female character, raise your renown to 50.
Kill or wound at least 500 enemies.
Kill 50 men as a female character.
Camp in the Sarranid region of the map.
Eat 6 different types food concurrently.
Defeat 10 enemy parties in the snowy regions of Calradia.
Visit every major town in Calradia.
Enter and win a tournament.
Raise your soldiers' morale from low to excellent.
Land a shot with a difficulty of 10 while using a bow and arrow.
Engage in a conversation with a hero character through the party screen.
Recruit 6 hero characters.
Sell 5 people to the ransom broker.
Land a shot with a difficulty of 6 while using a crossbow.
Cleanse the town of bandits in the opening mission.
Help a lord or party win a fight.
Install and play one mod.