I have recently encountered a new game that has caught me by surprise.
The Witness is a puzzle game based on mazes.
I was concerned when I first played the game that it had limited scope - the first mazes were pretty basic puzzle-book stuff. It didn't take long, however, to discover much more devious puzzles that involved internal symbols, environmental cues, sound cues, and so on. I am currently stuck on one with multiple internal symbols each with their own rules that need to be combined come up with a coherent solution. There is a definite addictive aspect coupled with a frustration component here.
This game has a first-person exploration style like many games such as Myst. The graphics are not even close to Myst level but are sufficient. I personally find the experience to be quite clean.
I have not finished the game yet so I can not comment on the quality of the end game. Based on my experience to date I would recommend it to anyone who likes classic logic puzzles such as those presented in games such as Myst. I have not found any time-boxed puzzles or deadly dead-ends - the latter is just as well as there does not appear to be an explicit "save" operation.
A big thumbs up for me so far.