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