.T.E.S.T: Expected Behaviour Review (Beartrap)
If you like first person puzzle games, I highly recommend this one. The puzzles are challenging, yet not overly complicated and I enjoyed figuring them out on my own (except for a handful of the advanced lift puzzles, see below). This game has some unique mechanics including time-manipulation that allows you to make a certain jump or throw very accurately or retry them without having to restart a level per se.
I also really enjoyed the plot if you want to call it that. Most levels start with you overhearing the mysterious testers talk about you and the puzzles, which functions as minor hints to solving the puzzle. If you like the way GLaDOS berates you in Portal you'll like this aspect, too.
My only critique is that I found 3 or 4 of the harder lift puzzles too tedious. While there's often multiple ways to solve the puzzles, these ones require pressing buttons in a particular order at the exact right time and have very narrow margins for error where a fraction of second makes all the difference. Other than that, it was very enjoyable and well worth the price!