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