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