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