I’m obsessed with this subversive puzzler that’s been featured on the iOS store soon after it was released. In TouchTone, by developer Mikengreg (A guy named Mike and a guy named Greg), you help the NSA spy on citizens by solving puzzles to intercept messages. A story unfolds through these messages, which you get every few puzzles. The tutorial quickly lets you know with a wink what it thinks of what the NSA is doing here. I’m hooked on the puzzles, many of them very challenging, and on the story, I haven’t finished yet.