Here is the full list of all 21 Mount & Blade: With Fire and Sword achievements.
Join the Crimean Khanate and eliminate all other factions.
Tend to your army's illnesses, five times, by resting or feeding them.
Complete the summer feast quest found in any village on the eastern side of the map.
Join the Kingdom of Sweden and eliminate all other factions.
Kill 50 enemies with grenades.
You've made 100,000 thaler from using trade caravans.
Keep 10 bundles of velvet in your inventory.
Earn 3,000 thaler in profit from a single caravan trade.
Start any main storyline quest found in the three main factions.
Customise your mercenaries' equipment using the mercenary camp.
Build three upgrades in a single town/castle you control.
Successfully blow a hole in a castle/town wall before a siege.
Using any firearm; kill 100 enemies.
Buy drinks for everyone at a bar.
Build a wagon fort from the camp menu.
Get in a bar fight.
You've made 1,000,000 thaler from using trade caravans.
Finish the Cossack Hetmanate's main storyline quest "The Black Mace"
Finish the Polish Commonwealth's main storyline quest "The Deluge"
Finish the Moscovite Tsardom's main storyline quest "The False Dmitry"
As any faction; conquer the map and eliminate all other factions.