Don't let the title fool you, This is the newest installment in the "Souls" series, by From Software. Similar mechanics and overall gameplay, just everything's been replaced with blood. "Souls" are now "Blood echos", "Estus Flasks" are now "Blood Vials", and everyone is talking about blood, and... Well, you get the message.
But they've switched things up enough that it doesn't feel same-old-ish at all. It's familiar, but different enough that you go in and have to relearn a lot of new things. Specifically, the combat. There are fewer weapons here than in previous "souls" games, but every weapon has two functions. A saw that turns into a spear, an axe that turns into a halberd, a sword that turns into a hammer (no, seriously) and so on. There are a multitude of combos and attack patterns for each weapon, and figuring out your favorite and learning its every poke and slice is a pleasure.
There are also no shields in this game, so no hiding behind a solid sheet of metal, either. Instead, you have guns, which shoot bullets, which are like shields just traveling at extreme velocities. Timed right your gunshot can "parry" an opponent's attack, leaving them open to a devastating counterattack. Even if you miss the timing, more often then not your shot will still stun the enemy for a bit of time, so it'll prevent you from taking a hit. The downside is, ammo is limited, so don't think you can get too carried away. There's also dodging, which makes you invulnerable for a short period of time. Overall, the combat is much more fast-paced and frantic than other "Souls" games, and I love it all the more.
The aesthetic and world are also swapped up. No more castles and dragons and knights in armor. You're in essentially a werewolf infested Lovecraftian nightmare, with disturbing creatures and cryptic lore around every corner. The feeling is one of dark, brooding horror, dripping with blood and slime. As a fan of Lovecraftian horror this is a huge plus for me, and I find the world disturbingly inciting. But, it may also be a bit too much for some people who don't like that style.
Oh, and while we're on the topic, this isn't so much an action adventure game, as a horror game that killed an action adventure game and is wearing its skin. I have felt more legitimate fear and tension in this game than I've felt in a while. Dark Souls and Dark Souls II had some scary moments, but this game, it's scary most of the time and it can be outright TERRIFYING. That's another plus for me.
Now, what I didn't like so much. The boss battles. Their visuals are designed wonderfully, but A. they're not very hard for the most part and B. You start to develop a pattern of how to kill them, that works on almost all of them. There are 4 bosses in the game that I really had a hard time with, the rest (there are a lot more) I killed on my first ~ third try. And no, I wasn't extensively level grinding or looking at walkthroughs. Granted the road TO the boss was harrowing and very difficult a lot of the time, but I would have preferred the bosses having a bit more of a challenge. I have completed both Dark Souls and Dark Souls II so I probably do have more practice than new players, but even so. Killing a Souls game boss on the first attempt is, to me, a bit of a letdown. Some bosses have gimmicks instead of brutal attacks, but those tend to be easy to figure out too. This is the only real gripe I have, but it is something that bothered me to the end of my first playthrough.
Oh, and PvP is, well, PvP of a souls game. You can ask for help, go to help, or go to invade. Pretty straight forward. Fighting itself is again a lot more frantic and fast-paced, but the overall system is basically the same as previous "Souls" games.
Anyway, I griped a bit but overall this game is a blast. I've started New Game + now, and I fully plan on playing through to the end again. Definitely highly recommended, and it's worth getting the PS4 for this (that's what I did, anyway).