Here is the full list of all 28 Vampire's Fall: Origins achievements.
Refuse to bite Sava Savanovic
Complete the expansion "The Hunt for Sava"
Complete the brutal mazes
Defeat Arvid Varanger
Defeat God of Brutals
Defeat God Brutal of Guard
Defeat God Brutal of The Wild
Defeat Enigma
Defeat Xaphxan The Invisble
Defeat Aendisea's Bane
Defeat Fulacks the Ugly
Find the world cornerstones
Defeat Death's Advocate
Defeat Styx's Servant
Defeat the Hunter Killer
Defeat The Rat King
Defeat Lernaean
Defeat Shadow from The Abyss
Defeat the being in the Rat Tree
Defeat The Tusk Trio
Find and defeat the three spirit brothers
Defeat the Koccuburry Cave Dweller
Defeat the Beast of the Valley
Defeat Vaso
Open the seals of Gont
Defeat the Mother of Wolves
Bite Sava Savanovic
Survive the attack on Vamp'Ire