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