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.
Make one of your ranged weapon skills 250.
Have two of the following skills at a 5; Trainer, Tactics, Leadership, or Persuasion.
(MP) Kill 25 people with throwing weapons.
Kill 75 enemies with horse archery.
(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.
Become the owner of at least 5 fiefs.
Win a battle against a lord or party who previously beat or captured you.
Kill 10 parties of Mountain Bandits.
(MP) Win a round of deathmatch mode.
Visit every major town in Calradia.
Kill 50 men as a female character.
(MP) Perform 25 lance kills while mounted.
Get either two agility related skills to 5 or one to 7.
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.
Kill 75 enemies with throwing weapons.
Make one of your melee weapon skills 250.
You have completed the following achievements: Abudant Feast, Mace in yer Face!, Sarranidian Nights, and Art of War/Melee Master.
You have completed the following achievements: Melee Master, Knights of the Round, Every breath you take, I dub thee/Good Samaritan.
(MP) Win a round of team deathmatch mode.
Get Married.
Have a -50 relation with a lord, village, or faction.
Raid 3 caravans and raid 3 villages.
Be granted your first fief.
Defeat 10 enemy parties in the snowy regions of Calradia.
Kill 10 enemies with a throwing weapon's secondary function.
Successfully defend a castle.
You and your army have killed or wounded 5,000 enemy troops.
(MP) Kill 25 foes with a blunt weapon.
Face off against 100 enemies using custom battle mode.
(MP) Slay 50 foes with slashing weapons.
(MP) Your team successfully defended a castle in siege battle mode.
Sell 5 people to the ransom broker.
Learn 3 poems from tavern bards.
(MP) In any multiplayer mode have more kills than deaths.
Kill or wound at least 500 enemies.
Land a shot with a difficulty of 10 while using a bow and arrow.
Enter and win a tournament.
Pick a fight with a lord by insulting him or by challenging him to a duel.
Eat 6 different types food concurrently.
Recruit 6 hero characters.
Land a shot with a difficulty of 6 while using a crossbow.
Finish reading one book through the camping screen.
Land a shot with a difficulty of 5 while using a throwing weapon.
Raise your soldiers' morale from low to excellent.
Harass wondering peasants on the map.
Engage in a conversation with a hero character through the party screen.
Help a lord or party win a fight.
Camp in the Sarranid region of the map.
Install and play one mod.
Steal 3 cattle from a single village.
Cleanse the town of bandits in the opening mission.
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 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.
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.
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) Kill 100 people with mounted projectiles.
(MP) Win one round in battle mode.
(MP) Kill 50 foes with throwing axes.
(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.
You have completed the following achievements: Trick Shot, Khaaan!, Agile Warrior, and Harassing Horseman.
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.