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