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