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