Looking for a ps1 game

I want to find the name of this old school ps1 game. You play this human that's slowly turning into a daemon, unless you drunk the blood of humans. The more blood you drink the more human you are. It's indicated by this spiral percent bar up the top right

but john, you are the daemons. Then john was the daemons.

Can't find the name. Does anyone know wtf I'm on about?