While a Batman metroidvania sounds really, really good in principle, this game is probably the worst implementation of it I could imagine? The 2.5D nature makes it really hard to tell what you can and can't interact with, given that you'll be going in and out of the background in various rooms, and the combat system being a stripped down, less-controllable version of the Arkham games' fighting means that enemy encounters are a slog rather than an easily skipped or shot target when traversing older rooms. The enemies can be in three dimensions, but you cannot move in them, so if someone is not quite in the melee yet, or is pushed aside somehow, well, enjoy dropping combos as you want to hit them. (Similarly, it makes targeting whoever has the assault rifle a real bear, because guess what the lock-on doesn't prioritize in this game like the others?)
Another thing that should be mentioned is that while they try really, really hard to make sure the controls keep continuity with the other games, this is adapted from a 3DS/Vita game, which means that some very, very strange controls are in place, and let's not even get into how Detective Mode is basically just "see vision cones because where enemies are looking is not always clear". To actually look at things, you need to turn on DM, then hold the button down to bring up a magnifying-glass reticle, then shift it with one stick while hoping anything at all on your screen is something Batman will interact with. These objects are, by and large, not highlighted (or sometimes even hinted at in any fashion), so just pull out the ol' magnifier whenever you hit a dead end and hope that's the right response, not "oops I needed to look at a grate two rooms back so I could open it".
Let me be fair to the game and give it some honest praise: it seems to be somewhat non-linear. There are three seperate wings of the prison you need to get into, and each is its own distinct area with a gadget that'll help you progress/an upgrade to pass more security clearance, which will also open up new secrets in the others, so that's cool. It's just that the actual traversal and exploration is a massive pain due to the environments being unclear in what's set dressing and what's interactable, and the combat being a large slog for back-and-forth travel. (It doesn't even give you XP or anything like in the other Arkham titles, so it is seriously just time-wasting filler. Your health regenerates slowly out of combat.)
I seriously can't recommend this game to anyone unless you really, really want to see Batman do the Samus thing, or finally want an Arkham game that lets you play dress-up without needing to NG+ it. It's not particularly fun and so, so many games on Steam scratch the gameplay itch for this genre better.