One puzzle is so difficult its creator believes only around 1% of players will be able to figure it out.
We now know when the new game from the creator of Braid will launch.
With sales of the indie hit drying up, Blow has to borrow money to finish his latest game.
All in-game puzzles complete, Jonathan Blow confirms.
Explore a mysterious island and solve puzzles.
Braid creator Jonathan Blow has explained why his next game, The Witness, won't be coming to PS3 or Xbox 360: it's because both platforms are too old.