My Impressions so far:
Okay, so after many hours of playing (still not even half-way through the game yet :lol) I think I've gotten a pretty good feel for the game play. First off I just want to say that this game has some of the best production values I've seen in a game for a while. Amazing soundtrack, great art direction (this game has tons of it and trust me it adds to the atmosphere like crazy), and an all star voice cast.
In terms of game play, the combat is very similar to God of War but with some Classicvania throwbacks to it. For example aerial combos, blocking, dodging, and attack range all differ in execution from the God of War combat engine. Castlevania also features a sort of "devil-trigger" style magical relic power up. What separates Castlevania's "devil trigger" from other games is the fact that you have a light and dark transformation, each with their own power bars. It takes a little getting used to, but you find mixing these transformations mid-combo in combat can be very helpful in the more challenging combat areas. My only complaint with the combat is that the camera can be a bit jerky at times during hectic battles. It's nothing game breaking, it's more of a minor annoyance to be attacked by an off-screen enemy that you can't really do anything about.
In Classicvania style the game play contains a good amount of platforming as well as puzzle-solving in addition to the combat. The platforming is inconsistent but not bad overall. There are times where Gabriel falls to his death while he is swinging on his whip :lol. There are also time where he just misses a jump and instead of reaching up at a ledge he will smack into the wall and fall to his death. There are also invisible walls EVERYWHERE, but they don't generally effect the game play, but rather any exploration you'd want to do. I've only run into a few instances so far where these issues are really noticeable. There are times where the platforming has been great, swinging from hook to hook in Classicvania style while the camera changes up and epic music plays in the background, you just gotta love it

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The climbing mechanics take a little getting used to, but they are fairly solid once you get it. The climbing borrows from games like Assassin's Creed, Uncharted, God of War, and Shadow of the Colossus. You have a sort of auto climb you can do by pushing the analog stick in any direction when the ledges are close enough. Gabriel will look around to let you know where he can and cannot jump. Ledges blend into the environment in a similar fashion to Uncharted, so you are going to want to be sure you are paying attention to Gabriel's animations so you know where to leap next.
As I mentioned before there is also a good amount of puzzle-solving in this game. The problem is, it's all been rather simple or shallow puzzle solving so far. Which explains why most of the puzzles are able to be completely skipped. I've yet to skip a puzzle, but I noticed the option when I was doing the first puzzle and it's been on every puzzle since that. This is probably the weakest portion of Castlevania. The puzzles have all been shallow time consumers, or tired gaming cliches. None of them are very satisfying or clever and it makes complete sense why they've opted to make the puzzles "skipable".
Overall: I like it

. The presentation and graphics are INSANE and the game play is generally top-notch. It definitely had it's flaws. There's nothing game-breaking or horrible to the game play, just some strange design choices. But I can't say I don't recommend it, it's been a pretty epic and rewarding experience so far. If you can look past some of the annoying little design choices it's one of the better action adventure titles to hit the market.