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