Well this came out of nowhere! Yesterday we told you how the 3DS version of Sonic 1 was released in Japan, in the last hour without any announcement, the ‘Stealth-Tax’ version of Sonic 1 for iOS has been released and it contains two big surprises!

Tails and Knuckles are now playable! Confirmed by both the product description and official screens on the product page, Tails and Knuckles can be unlocked giving you a completely new playing experience.

Also included are time trial leaderboards and a remastered soundtrack. If you already own the game on iOS you can upgrade for free, however, the product description warns that when you upgrade your old saves will no longer work. If you’ve never bought this game before, it costs £1.99 from the iTunes store.

SSMB user Super Spindash was kind enough to upload a short video of the game, so if you want to see and hear what it’s like, check it out.

Download from here. US & Canada release is May 16th.

Thanks to Mark1 for the heads up.