The Bite: Revenant v0.71 by madmate.games

Thrust into the darkness of vampire underworld, our protagonist needs to adapt fast to the decadent and depraved ways of the vampiric aristocracy. With some luck and a bit of help from a mysterious stranger he manages to survive the initial encounters with powerful individuals, but to truly prosper he needs to quickly familiarize himself with this world's ever-present scheming and high stake political games...

At first ignored or used as a pawn, he realizes quickly that to prosper in this world he needs to chose his actions and allegiances carefully. How will he use his new found powers in this world of debauchery and intrigue? How will he decide who to trust, who to obey, who to conquer, and who to betray?