Liquidum

Liquidum is sort of like a picross or hex puzzle game, but much more complex.
The numbers on the rows represent the total number of water units they contain, and you have to fill them using logic.
Thus far, nothing changes from a classic picross game.

However, the puzzles of Liquidum are not just about using those numbers. The grid is divided into several aquariums and to fill the upper level of an aquarium, you need to fill the bottom first.
Combined with the numbers on the rows, that’s your main source of deduction. And there are even more mechanics you’ll encounter that render the game quite hard.

Speaking of the difficulty, it varies greatly depending on whether you deactivate an option or not. By default, the game doesn’t allow you to make mistakes; that is to say that if you click on a wrong cell, it will tell you that you can’t put water in it.
The “allow mistakes” option removes that, you’ll never know when you make a mistake and puzzles become much harder. I think the game is far better played like that and that option should be the default. Especially for the main levels that are just ruined if the game directly tells you where you were wrong.
The last level took me more than 2 hours because I tried until I had the correct logic, that’s not possible if you know what you did wrong on the first try.

I really liked the concept of the game, original with varied and small challenging levels. You also have a daily level and a random level generator if you want more (the insane difficulty is weird and will throw extremely easy levels sometimes though).
Liquidum is a solid game (…), definitely worth it if you like advanced logic puzzles.

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Developer: Marvellous Soft
Publisher: Marvellous Soft
Platform: Steam – Windows/Linux/macOS
Release Date: February 21, 2024