Play time: 5 hours (main story)
+A few fun puzzles
+Unique game world
-The game requires a lot of pixel hunting, easy to get stuck
-Weak story that doesn't make all that sense
I had a bit of fun with Nikopol: Secrets of the Immortals, but the game has too many shortcomings to be good enough for me to recommend anyone to buy it, even fans of adventure games.
It's a point and click game with a 3D interface, you are stationary in each room/view with the ability to look around freely, and you can click some door openings etc to change room/view. Finding the items needed for solving puzzles can get a bit frustrating, you'll have to pixel hunt to a certain extent, and it's frustrating not knowing what could be missing to progress, and pixel hunt all previous rooms/views to find the missing object.
Some of the puzzles are nice especially the early/mid game "coding" with symbols/items.
The game world/setting started out promising in a dystopian future Paris, but it wasn't explained as much as I would have liked, and fell short. Same thing goes for the plot. It would probably make more sense if you've read the graphic novel, which I haven't, so for me the story wasn't that strong, and left me with a feeling of playing through an unfinished game.
For me, the weak story and gameplay outweighed the few positives of this game. It's still enjoyable to a certain degree, but not a game I would recommend anyone to buy, even at a sale.