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