Anniversaries/September 22
From Sonic Retro
September 22 (add)
- 1995 — Tails Adventures is released for the Sega Game Gear in Japan.
- 1999 — Issue #77 of the Sonic the Hedgehog comic series by Archie Comics is released in North America. Issue #165 of Sonic the Comic is released in the United Kingdom.
- 2004 — Sonic Panel Puzzle is released for i-mode 503i and i-mode 505i compatible phones through Sega's Sonic Cafe portal in Japan.
- 2009 — Volume 1, Volume 2, and Volume 3 of Sonic X, all DVDs, are released in Germany.
- 2010 — Sonic Adventure is released for the PlayStation 3 in Europe and Australia. Issue #217 of the Sonic the Hedgehog comic series by Archie Comics is released in North America.
- 2021 — Sonic the Hedgehog 5: Crisis City, a trade paperback, is released alongside Sonic 30th Anniversary Symphony (Live) being released for the Mora streaming platform in Japan. Tsugino Seno! De - ON THE GREEN HILL -, a single by Dreams Come True, is released on CD in Japan and digitally worldwide.