Just finished this, superb. If you were a fan of Myst (which probably dates any of us), check out The Eyes of Ara.
IGN had a decent write up here: http://uk.ign.com/articles/2016/08/11/the-eyes-of-ara-an-enthralling-mystery-from-a-one-man-team
It's challenging, fair and really interesting. I couldn't decide on No Man's Sky and this was recommended instead, and for $15 totally worth it if puzzle games are your thing.
IGN had a decent write up here: http://uk.ign.com/articles/2016/08/11/the-eyes-of-ara-an-enthralling-mystery-from-a-one-man-team
It's challenging, fair and really interesting. I couldn't decide on No Man's Sky and this was recommended instead, and for $15 totally worth it if puzzle games are your thing.