People have been complaining for a while that passing a CAPTCHA is too difficult, but developer and tech CEO Guillermo Rauch has made one of the hardest yet: a fully playable CAPTCHA based on the classic PC game Doom . It been a long running joke that developers will make Doom run on absolutely anything, so it not much of a surprise that it now running inside something that resembles a CAPTCHA. The app essentially amounts to a small Doom level that is playable with keyboard controls arrow keys...
