Here is the full list of all 56 Blade of Darkness achievements.
Complete Tabriz`s story level
Kill the knight at Tabriz
Survive the first encounter with Chaos Knight for Sargon
Kill an enemy with a limb
Complete the game as Tukaram a barbarian
Kill lava golem, Guardian of Uri-Sabrig
Kill 2 stone golems
Kill Guardian of Birr
Gaze at the map of the Kingdom a little longer
Complete Kashgar, Tukaram`s story level
Watch the credits
Complete the game in one run, in 8 hours or less without using saves a single time
Choose to go to the Abbyss and destroy the evil
Complete Abyss level
Kill the Lord of Darkness in the Abyss
Kill Meskalamdug in the Abyss
Kill Chaos Knight in the Abyss
Kill the vampire in the Abyss
Kill lava golem in the Abyss
Kill the iron golems in the Abyss
Complete the game as Zoe, an amazon
Complete the game with the saves rating 'AWESOME!'
Complete the game with the saves rating 'HEROIC'
Complete the game with the saves rating 'BOLD'
Complete the game with the saves rating 'NORMAL'
Choose not to destroy the evil completely
Kill Dal Gurak
Kill Meskalamdug
Survive an encounter with Chaos Knight
Complete Tower of Dal Gurak level
Complete a basic controls tutorial
Watch the game's intro till the end
Complete The Temple of Ianna level
Complete Fortress of Nemrut level
Complete The Gorge of Orlok level
Complete Temple of Al Farum level
Complete Forge of Xshathra level
Complete The Oasis of Nejeb level
Defeat the vampire for the second time
Complete Shalatuwar Fortress level
KIll Orc cheaftan, his minions and minotaur
Complete Island of Karum level
Defeat the vampire for the first time
Complete Tombs of Ephyra level
Kill the stone golem
Kill the burning skeleton
Complete Fortress of Tel-Halaf level
Complete Mines of Kelbegen level
Kill The Troll of Kelbegen
Complete Marakamda, Zoe`s story level
KIll the demon at Marakamda
Kill the first enemy
Complete Kazel Zalam, Naglfar`s story level
Kill the Troll of Kazel Zalam
Complete the game as Sargon, a knight
Complete the game as Naglfar, a dwarf