The Witness contains 600 puzzles, one of which only “1% of players” will probably solve

Jonathan Blow's The Witness is overflowing with puzzles – some of them harder than others. In a post over at the PlayStation Blog, wherein creator Jonathan Blow (best known for Braid) is interviewed by Justin Massongill (who spent 50 hours completing an alpha build), the question of difficulty came up. You won't need to complete