From Sonic Retro
June 25 (
- 1994 — Issue #29 of Sonic the Comic is released in the United Kingdom.
- 1997 — Issue #107 of Sonic the Comic is released in the United Kingdom.
- 2008 — Issue #34 of the Sonic X comic series is released in North America.
- 2011 — The fourth annual Summer of Sonic fan convention takes place at the Camden Centre in London, UK.
- 2014 — Worlds Collide Vol. 3: Chaos Clash, a trade paperback, is released in North America. Sonic R Original Soundtrack is made available to download through Amazon in Japan, North America, and Europe while it is made for available to download through iTunes in Japan, North America, Europe and Australia.
- 2015 — Sonic Runners is released for iOS and Android worldwide.
- 2016 — Mario & Sonic at the Rio 2016 Olympic Games is released for the Wii U in Australia.
- 2020 — The theatrical Sonic the Hedgehog film is released on DVD and Blu-Ray in Germany.