Labyrinthine Review (Soziaz)
I played every chapter of Labyrinthine, including the final one, with my fiancée, and we both agree that it is a fun coop-horror game.
The monsters have individual characteristics you will have to memorize to survive, because most you can do to fend them off yourself is to stun a few of them for several seconds. Some puzzles are to be solved. None of them are too hard, but all are creative and plausible.
All in all a fun game to kill several hours with, especially with friends.
Addendum I:
While the fifth and, for the time being, final chapter is a little longer and more stealth-based than the preceding levels, it is varied enough to not be boring. The game is still in early access, so I hope the developers will follow up with a few chapters at least as entertaining as the first five ones.
Addendum II:
I'm yet to try the additional "case files", but I've heard that they include new areas and monsters, so that's a plus in my book.
Addendum III:
I played a couple of case files with friends and they are fun.