Have you got Sonic the Hedgehog on iOS? You should probably check the App Store, then - the Mega Drive classic has been remastered in a significant update that not only adds the Spin Dash and widescreen support, but also playable Tails and Knuckles.The update,
Sonic the Hedgehog v2.0, was made available on the iOS App Store last night, and transforms the simple Mega Drive ROM emulation into a bona fide remaster. Bugs in the 16-bit original have been fixed in the game's code, using an engine created by
Sonic CD 2012 programmer Christian Whitehead.
Tails and Knuckles are the big surprise additions to the new version. Tails was introduced in Mega Drive sequel,
Sonic the Hedgehog 2, and was never playable in its predecessor. Knuckles the Echidna, a rival introduced in Sonic 3, was playable in
Sonic the Hedgehog 2 thanks to lock-on technology with the Sonic & Knuckles cartridge. He was never playable in Sonic the Hedgehog either, although it's an urban myth that this was simply due to technical limitations between the lock-on cartridges.
The update is free for those who have already purchased the iOS game, and replaces the emulated original on the App Store at £1.99.