Here is the full list of all 41 Bound By Flame achievements.
Vanquish Lord Blackfrost
Preserve your humanity
Kill 50 enemies with a warhammer
Recycle 30 objects
Set your enemies aflame 50 times
Make 100 objects (potions, booby-traps and munitions)
Vanquish a Concubine
Accomplish 20 side quests
Unlock all the the Warrior skills and their upgrades
Vanquish a Deadwalker General.
Fire 50 crossbow bolts
Kill 50 enemies with an axe
Vanquish 150 enemies
Search 50 fallen enemies
Set 20 traps and have them sprung
Make 5 improvements to your weapons and armour
Vanquish 75 enemies
Loot 20 chests
Kill 50 enemies with a sword
Vanquish a Juggernaut
Vanquish 25 enemies
Upgrade a skill
Become the most powerful being on Vertiel
Purify Vertiel by bathing it in flame
Use the energy of the Worldheart to annihilate the Ice lords and save Vertiel
Accomplish your transformation by following the demon's way
Seduce Edwen
Seduce Rhelmar
Seduce Sybil
Seduce Randval
Accomplish all of Sybil's personal quests
Accomplish all of Rhelmar's personal quests
Accomplish all of Randval's personal quests
Accomplish all of Edwen's personal quests
Complete Bound by Flame in the Hawk difficulty mode
Complete Bound by Flame in the Buffalo difficulty mode
Complete Bound by Flame in the Captain difficulty mode
Kill 50 enemies with daggers
Poison your enemies 50 times
Unlock all of the skills of a Ranger and their upgrades
Unlock all the Pyromancer specialization skills and their upgrades