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