Found this FTP game on steam. It's a third person pvp game with humans versus vampires. There are 5 classes of humans and 5 classes of vampires. The vampires mainly use melee attacks with some magic attacks/buffs. They can scale walls and one of the classes can fly. The humans have ranged weapons, like crossbows and dual pistols. I've only played for a few hours but it's some pretty fun stuff.
It's based on The Legacy of Kain series and while I think I've actually played 2 or 3 of those games I remember nothing about the lore, so don't know how true it is to that series.
It's open beta right now and runs/looks pretty good.