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