Hudson's TurboGrafx-16 GameBox is a free to download iOS app, that will let you demo, purchase and play some of the best games the eponymous console had to offer, including such masterpieces as Bomberman '94, Gradius, Devil's Crush and Bonk's Adventure. What really matters though is that the latest update has added Raiden to the available games. Yes, Raiden! My all time favourite scrolling shoot-em-up and the game that ate the vast percentage of my childhood coins. Here's TurboGrafx-16 GameBox on the App Store. You owe it to yourself to at least try it; it wont cost you a thing.