Let me again remind you that it's a FICTIONAL story
It was made up and written by 1 guy and it probably shouldn't be analyzed to such depths and extents, since you certainly won't find any 100% officially consistent things inside.
I mean - even true & official well-documented stories in our modern times are many times riddled with inconsistencies, mis-interpretations and factual errors; so when playing a videogame which has magical orbs, 300 year old barons and walking corpses as it's main ingridients, the players should keep in mind that making actual sense of it is about as efficient as renting a boat with diving gear and then trying to find Cthulhu in the submerged city R'lyeh.
A few bottom lines:
- Alexander is a being from another dimension, who somehow got stranded in our dimension and is trying for centuries to return home.
- the only way for him to do this is to assemble enough mystic orbs in a gigantic machine and thus open a portal home.
- Alexander and his servants were somehow able to abduct, torture and kill hundreds of people over a couple of hundred years with the purpose of extracting their life force so that the Baron could live on and continue to search for a way home, eg. build the portal machine and find enough orbs for it to work.
- at some point the authorities got wind of it and started to investigate which forced Alexander in to a corner and kill off his remaining human servants.
- by a stroke of luck (or weird fate) he was just then contacted by Daniel, who had the last missing orb in his possesion.
- when Daniel arrived, he was so afraid for his own life that he agreed to do whatever it took for him to stay alive (mostly true human behaviour as explained earlier), including torturing and killing a couple of people.
- this was made a bit easier by Alexander, who (probably falsly) told Daniel that these persons were criminals deservant of their fate.
- Alexander's goal was always just to open the portal home by any means necessary; Daniel's goal was always just to stay alive, but after killing the truly innocent girl his mind finally snapped at the realisation of the truth - that he was a selfish and cowardly killer of innocent women and children; and even then his first thought was not of repentance but only of revenge against Alexander which once again shows his underlying personality.
- None of the above ever really happened, neither in Prussia nor in any other part of the world; it only happened on our PC's and even then it was really just a long string of one's and zeroes.
My 2 cents