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