Why do I even own this? That was the question going through my head when playing this. A terribad something that tries to cater to all kinds of people, falls flat in every respect and tries to cover it up with huge mammary glands (more like Boob Knights, am I right?). At one moment in time this might have had potential - but as it stands it's a less than average mix of action, twinstick shooting, hack'n'slash, RPG elements and a silly B-movie plot.
It's not that these elements are wrong, but they don't click in Blood Knights. Everything is so limited, and doesn't fit the scale of this game. You have RPG elements - but it's not like you can actually grind for XP, you will reach max level by the end of the game anyway. You have skillpoints, but skills don't do much besides giving you that awesome +2% crit-chance you always wanted and none of them alter gameplay drastically. There is loot too, but it is again so limited and hardly game-changing, you do more damage and can survive longer for the most part. All of this feels tacked on and kind of out of place - after all, you basically go from stage to stage clobber everyone and everything up, take their stuff and watch unfunny and stiffly animated cutscenes, rinse and repeat. Why do I need levelings and loot? Right, I don't.
The action itself is pretty okayish, the hack'n'slay parts I don't really care about, too lightweight and buttonmashy. However, the female vampire sporting the dual-crossbows felt nicely "twinstick-shooter" and quite fun to play. If they had only stuck to that mechanic and built a pure action-game around that. Instead, you get some lacklustre platforming, simplistic switch-puzzles, the aforementioned RPG-stuff and even an empty, barren "hub" that you can return to in order to trade with excatly one merchant and grab one of like three sidequests (the one I did was "shoot 4 torches" - amazing, I know!). If this was an amateur project to experiment with various gamesystems and ideas, I could understand the patchwork-like design choices and the limited variation but as a retail product I don't get it. I mean, you have a handful of enemies that you fight again and again in small arenas, there are maybe 4 bosses that vaguely could be called that, and you usally fight in the same-ish areas (ruins, mountains or mountain-ruins with a random castle-intermission thrown in every now and then) - why on earth would you makes this a game that only does everything?
A whole other topic is the non-sensical storyline (lots of relics, the catholic church in rome and well, vampires!) and the particularly embarassing portrayal of female characters in this. It's the worst kind of "forever alone"-material outside of certain japanese games that I have seen in a long time. When your characters defining traits are "big boobs" and "bigger boobs" you are doing it wrong. The first half of the game the dialogue between the male hero and female hero could be summed up as "shut up, woman!" which is not my idea of witty banter. Needless to say this fits the overall quality of the game quite nicely.
For the fan of abyssmal b-movie trash turned videogame this might actually be a little gem (if you have enough beer at hand), it really is that cringeworthy. But for anybody else, I see little appeal. None of the system implemented are fleshed out enough to justify a purchase AND there are tons of alternatives that do them better anyways.
Why bother with Blood Knights? I have no idea. Save your money or spend it on Vampire: Bloodlines or the Legacy of Kain-series instead.