Video games used to be full to the brim with hard as nails, fist-through-monitor rage inducing puzzle games. That happens a lot less these days, but if you'd like an experience that makes you feel really dumb, there's a big discount on The Witness right now.
Joking aside, The Witness is a delightfully pretty game minus the masochism. Mark loved it so much he ended up literally drawing on his TV. Others did crazy stuff with graph paper.
It's an unusual, special game. And if you want it on the cheap for PC - Xbox users got it for nothing recently - then you can grab it for just over $16 through Good Old Games.
For more info, head to GOG.