What this game nails is the atmosphere. The main setting is a huge mansion and it feels like a maze. Sadly, everything is weighted down by the terrible selection of weapons. None of the weapons are really good, nor do they cater to play style. The main problem is the random hitboxes. Sometimes you can kill an enemy in two shots to the head, other times they take 5-6 bullets. Same thing with the only melee weapon, which is fun to use, but every weapon is way too slow, compared to how the enemy can close distance. Overall, a kinda confusing experience with lots of potential, but it should've chose between either focusing on gameplay or story.
Run around, kill enemies with limited moveset, puzzles that mostly consist of throwing enemies onto things, but you get to play as a badass vampire, so it's okay, I guess.