Tails didn't originally appear in Sonic The Hedgehog back in 1991, but the mobile remaster features him as an unlockable character once you complete the game!
Posted by SEGA Forever on Monday, June 26, 2017

Have you set up a #SEGAForever screen or folder on your device? Tell us some of the SEGA titles you’d like to see next! pic.twitter.com/6VUFhidygL
— SEGA Forever (@SEGAForever) June 25, 2017

Which of these classic Sonic titles would you most like to see in the #SEGAForever line-up? ?
— SEGA Forever (@SEGAForever) June 24, 2017
Want to jump ahead in Sonic The Hedgehog? Start a "No Save" file, and when the SEGA logo appears, tap the screen…
Posted by SEGA Forever on Saturday, June 24, 2017

Have a controller? Use it to enter the old Up, Down, Left, Right, A level select cheat on the Sonic The Hedgehog title screen! #SEGAForever pic.twitter.com/BK8QxLN98z
— SEGA Forever (@SEGAForever) June 22, 2017