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