Board Thread:Lords of Shadow 2/@comment-9249716-20130609232735/@comment-98.195.61.36-20130611005745

He actually earned forgiveness, which is why he survived his battle with Satan. That just happened to be the last thing he wanted. From his point of view, letting him live without Marie was actually a cruel punishment; if you'll recall, he collapsed to his knees, screaming and sobbing as Lords of Shadow ended.

He didn't technically become 'Dracula' until the events of Reverie and Ressurection, where he drank Laura's blood to become a vampire, and then absorbed the Forgotten One's power to become the unstoppable juggernaut he is now.

After he became Dracula, and realized that it was basically the Brotherhood sending him on a suicide mission that never had any hope of ressurecting Marie in the first place, he decided to punish them for it, which set the ball rolling for Mirror of Fate. Since the Brotherhood basically forced him into a confrontation in which he killed his only son, in addition to all the other crap they've done to him, he sends his werewolves to slaughter them, killing Trevor's wife in the process. This, in turn, sets Simon up to fight him.

By the time Lords of Shadow 2 rolls around, the Brotherhood is running out of Belmonts to send after him, and both Simon and Trevor and Vampire Trevor/Alucard have failed to kill him, they send all of their remaining forces against him at his Castle, which seems to go about as well, judging from the trailer.

So, there you have it. Gabriel's Transformation into Dracula is more or less the result of the Brotherhood constantly screwing him over, and his own reactions to their treachery,  combined with a massive dose of Dark Magic from chowing down on the Forgotten One.