Cognition is an adult graphic adventure about lost, revenge and fate.
Story is really well done and progresses nicely without feeling forced, most puzzles are logical, all characters are complex and have motivations that you can understand, this is helped by the great voice acting.
The game has a supernatural twist, but it doesn't feel cheesy and works well in the game for the most part, allowing for some very interesting mechanics.
DIfficulty is well balanced except a couple puzzles that might require an effort, but everything is feasible and can be deducted logically, no need for weird guessings. There are a few moments where you can actually die, but it's not frustrating since the game allows for fast retrying.
All 4 episodes are quite good, but the third one is weaker because it focuses on a single location, although it's needed to move the plot further and get ready for the final of the game, so it can be forgiven and it's not bad anyway, just not as good as the other 3 episodes.
The game has a few technical bugs, like the character moving through objects, but none are gamebreaking, just a few little annoyances.
Overall I greatly enjoyed the game and highly recommend it to anyone looking for an adult graphic adventure with an interesting plot.