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