GamesRadar - Jonathan Blow doesn't do demos. Last week, the esteemed developer brought four full builds of the Witness to the PlayStation Experience in Las Vegas. If you were enough of an asshole to ignore the growing queue of tutting people slowly amassing, you could play through it from start to finish. Me, I last an hour (I get nervous when I can't solve a puzzle and start picturing the punters over my shoulder taking the piss out of me for being stupid). But the hour I play gives me the most enigmatic, enchanting hour I've had with a game in a long time.