Fun game worth playing despite some jank
Others have called this "We Have Bloodstained At Home" that's not exactly wrong. But while they typically use it derogatorily, I would say it's a compliment.
This game is a solid Metroidvania (GOG has it labeled JRPG, it's not) in the Igavania style (so, yes, like Bloodstained). It's not top shelf. It has a little jank. But it's good and plays well. It has good play style/build diversity. Its early and even mid-game is a touch too easy, but late game bosses eventually require you to be "on". You can outgear/outlevel most things eventually though.
There's not a ton of backgtracking, but there is. The economy is weird... Early game you're scrounging for every penny, then mid-late game you're drowning in money with little to spend it on (new gear comes in faster than it's worth modifying), then end-game/post-game you're again starved for cash since everything needs so much... but by then you don't really need it.
There is a little bit of a post game with some harder versions of monsters/bosses and one new boss. And each boss (but the post-game one) is in the arena that unlocks about half way through the game, and each has 6 stages to do for fun and resources.
Graphics are "Unreal Engine 4" (just liked Bloodstained), and work fine. A few foes even fun, though a few (you'll see one as soon as you enter the Frozen area...) that are "WTF? Why?" bad.
Sound again is serviceable... music works, some good, but none terribly ear-worming or the best. SFX communicates what's going on in the game the game well. Certain monsters will have "I'm on this screen somewhere!" ambient noise you'll hear as a warning. Some sounds (e.g., the gatling gun) are balanced a bit louder than they should be, so you might want to turn it down.)
Story is purely functional. Nothing new, nothing bad. It propels the exploration. There are a few "can't go here until you report in!" moments I wish weren't there, but I can't begrudge them much. The in-engine cutscenes are usually fun... though some veer into anime-style "there was no consent!" boob jokes that are a little off-putting.
The game play itself is rather fun. You can build/play as melee, ranged, caster, faster, slower, high defense, etc. There are lots of choices on how you want to go: Which weapon/skill set? Which armor type? What accessories? And which passive "cores" (which drop from monsters) on each? And which set of spells? There's a built in swap to have 3 ready-made builds for each character for easy swapping of gear, but swapping cores in equipment is always a chore. Fortunately, most cores, you can easily farm more of. A few you can't, or can't until you can do them in boss rush.
The DLCs aren't worth it, except maybe on a big discount. Most are just costume cosmetics, you get what you see. One is a little bit of an early-game cheat. And the other is a single extra post-game superboss fight with an extra piece of gear (that you don't need by the time you can get it).
There's not a lot of online reference to find for the game, but it comes with an "ebook" (.CHM file, unzip and view in browser if you don't have an application for it) that's a full map, including reference for breakable walls and where to find everything. There are a few things it doesn't cover, but you can find reference for those. BUT! Overall the game doesn't *need* these references/searches except for maybe one or two things depending on the type of gamer you are.