Anniversaries/May 15
From Sonic Retro
May 15 (add)
- 2012 — Sonic the Hedgehog 4 Episode I is released for Android devices in Japan. Sonic the Hedgehog 4: Episode II is released for the PlayStation 3 and Steam in North America, Europe, and Australia.
- 2013 — 3D Sonic the Hedgehog is released for the Nintendo 3DS in Japan.
- 2014 — Sonic & All-Stars Racing Transformed is released for the Wii U and PlayStation 3 in Japan.