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