There are those games who do have potential and are somewhat fun, but fails in the end. Blood Knights is actually such a game. The biggest problem in Blood Knights is the camera, which is clunky at it's best and not accurate at all. In the beginning i had this problem of instead jumping on a platform above you that my char falls into the big black hole. And that happened a couple of times in an other level too.
The dialogue gets on your nerves sometimes. The fighting is ok i guess. The AI however is as dumb as an ox.
No, Deck13 didn't do a good job this time. Now Venetica was also not everything, but that one was better.
Nevertheless it's a little fun game to play, if you look past the errors. Characters itself look quite good and the landscapes are interesting. Story is ok, not very interesting. But that camera, that nails it. And that dimwitted dialogue.
If you're a fan of vampiregames and look for a game to play with a vampire, then there are better options.
Vampire the masquerade: bloodlines for rpg and the first 2 BloodRayne games (available at gog) if you want an action game. If you just look for a little fun game, it might be worth a try.I would suggest then to wait till it drops in price or there's a sale. If i recommend this one? Not really, but it just depends what you expect.