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