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