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