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