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