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