Up until recently, Sega relied on crude emulators to bring its classic games to mobile. That changed in 2011 with the release of Sonic CD [Download: iOS/Android], a fantastic port of the Sega CD hit spearheaded by independent programmer Christian Whitehead.
On that note, the publisher announced plans to give the original Sonic the Hedgehog a much-needed makeover on iOS via free update, and once again, Whitehead's at the helm. This new edition will completely wipe away the current version, replacing it with a widescreen-supported, 60 frames-per-second Sonic. In addition, the developers tweaked the controls, re-mastered the soundtrack and added a time attack mode. Finally, and to sweeten the deal, Sonic is on his way to Android. Both versions will sell for $2.99, and if you already own the game on iPhone or iPad, you'll receive the update free-of-charge.