Anniversaries/October 22
From Sonic Retro
October 22 (add)
- 1990 — "The earliest Sonic the Hedgehog (16-bit) prototype is shown at the Tokyo Toy Show.
- 1991 — "The Sonic the Hedgehog (16-bit) retail version is available for the SEGA Mega Drive.
- 1993 — "Model 2 of the Sega Mega-CD is released in the .
- 1994 — "Dulcy", the 20th episode of Sonic the Hedgehog, airs in North America. Issue #7 of Sonic the Poster Mag is released in the United Kingdom.
- 1997 — Issue #54 of the Sonic the Hedgehog comic series by Archie Comics is released in North America.
- 2005 — "Galactic Gumshoes", the 59th episode of Sonic X, airs in North America.
- 2008 — Issue #38 of the Sonic X comic series is released in North America.
- 2014 — Sonic Saga Series 6: Mogul Rising, a trade paperback, is released in North America.
- 2015 — The Sonic amiibo is released in South Korea.