If there is any next level of categorization of interactive art, this is it.
You see, Tunic is above games and greater than games, even though it is still a game. Not only does the player play the game, but the game plays the player (if you've played Inscryption, Pony Island, MiSide, DokiDoki, you'll understand to some extent).
An experiential experience that can't be replicated and can't be described - you have to try it yourself, not listen or watch others do it.

P.S.: Wanted to 100% too, but, well, I'm already learning a different language

Great game that has a lot of "a-ha that was here the whole time" moments that I absolutely love and wish more games focused on. Overall, it was an awesome experience, but a few issues really held it back from being truly amazing. *Very minor and vague spoilers below*

First, the camera angles were frustrating at times. Targeting creates this weird vignette that makes it harder to see and some puzzles are hard to piece together because of the camera. While it might be intentional, it is also annoying.

Second, losing consumables and not being able to get them back in-between respawns is incredibly punishing. You could use a lot of consumables when fighting a boss, die, and then have no consumables making the boss fight even more challenging or requiring you to go around getting consumables again. To me it is a very odd decision and one that just felt like you should never use consumables, which goes against their whole point of existing in the first place.

Third, some of the puzzles are very difficult or silly. Like having to piece together stuff throughout the game and retread the same ground to find the pieces was tiresome. And one or two puzzles requiring you to take notes and/or use an image editor outside the game to put it together is meh. Thankfully, these are few and far between (I only counted 3-4 with this issue) and can easily be looked up online. But having them at all took me out of the immersive experience, especially while playing on a Steam Deck, and would have been improved if you could "combine" things in-game.

Fourth, there's a decent amount of backtracking through stuff towards the end. It isn't too bad, but just something to note that can be boring treading through areas and things you've already done a few times.

Fifth, missing one little page can dramatically hamper you in terms of progressing. Again, not the biggest issue, but felt odd to be so far off track until I stumbled on something I had missed earlier.

Sixth, combat is okay, but a bit repetitive. I wish there were more combos or things to do at times. You get a stick earlier in the game and then never use it again. Thought it was a missed opportunity to have different core weapons or other attack abilities. Plus, swapping weapons or items in-combat is a weird dexterity speed check. Would have been better to pause the game to allow swapping or a button to instant swap to a different setup.

Overall, the game is very good but the few issues above really pulled it down instead of being as stellar as Outer Wilds was. 7.5/10

While that is my recommendation for any new game you wanna try, Tunic especially offers an experience that really is best enjoyed as blind as possible. It truly adds to the greatness of this game.

However, this is a review and you read reviews to know if the game is for you. So here goes what I think is the absolute maximum for you to know and expect going in: This game has a cute fox that dresses a bit like Link and has a sword. Therefore it isn't surprising that you can expect gameplay to have a lot of similarities to 2D Zelda games in both combat and an abundance of puzzles and little secrets to find.

Bosses are notably meaner than in Zelda and while I wouldn't necessarily say they're souls-like, some of them can feel like it at times. They might take several tries and they can be fiddly to learn/deal with. However, the game does have accessibility options like not having any stamina restrictions, reducing combat difficulty and even no fail mode, where nothing can hurt you anymore. So if the possibility of meaner combat has been a deterring factor, I wouldn't worry about it. There is no penalty for turning these options on, although I do encourage to try going without for as long as you're comfortable and seeing what you might find in the surroundings to make things easier if you're hitting a tough spot.

Either way, TLDR: It's a Zelda-like game with a fox. Boss combat can be mean, but also entirely ignored via accessibility options if so desired.

Other than that, let the game show you what it's all about itself! Have a bit of patience, especially in the beginning, and soon you'll see why I gave the warning I did at the very top of the review.