Apple briefly experimented with the idea of apps before iOS ever came around by releasing a number of click wheel-based games for the iPod Classic. The games were mostly classics or popular puzzlers, such as Sonic The Hedgehog, Bejeweled, and a remake of Pole Position.
Apple’s click wheel games were never especially popular, however their apparent removal from the iTunes Store is notable, as it suggests that Apple may be cleaning up after the iPod Classic prior to discontinuing the device.