Limbo developer Playdead is bringing the macabre platformer to iOS July 3, and the game's lifetime sales for the platforms it's currently available on have eclipsed 3 million copies, the studio announced today.

The iOS version — which will support iPad 2 and up, iPhone 4S and up, iPad mini and the latest-generation iPod touch — will cost $4.99. According to Playdead, development of the iOS port involved "rethinking the controls and performing extensive optimizations to ensure an amazing touch-based experience."

There's been a lot of focus from traditional gaming sources on how touch screen devices just don't work well for real games, because they don't have the multiple dedicated buttons that hardcore gamers demand. Nevertheless there are multiple classes of games that don't need hair-trigger responses and that–with some smart rethinking–can find a huge new audience on devices like the iPad. Limbo is just such a game, and I'll be eagerly downloading it.