The Hostage Trials is one of the more interesting and innovative Kickstarter game projects I've come across, but maybe too much so on both counts: In the game, you see, a psychopath calls you up, tells you he's kidnapped a friend or family member, then gives you a series of challenges you need to complete, or, you know, Bad Things Happen. Yes, really:

Voice acting by David Hayter, who also did the voice work for Solid Snake, so you know your villain will be badass. While the developers call it a Real-Time Mobile Adventure, it's basically an Alternate Reality Game with a particularly sharp edge. And while I say it's innovative, something like this has been done before -- as it happens, I helped work on a thematically similar project over 10 years ago, way before its time: