Anniversaries/June 21
From Sonic Retro
June 21 (add)
- 1993 — The build date of the v0.51 Sonic the Hedgehog CD prototype.
- 1995 — Issue #26 of the Sonic the Hedgehog comic series by Archie Comics is released in North America.
- 2000 — Issue #14 of the Sonic Super Special comic series is released in North America.
- 2001 — Sonic Adventure 2 is released for the Sega Dreamcast in Spain.
- 2012 — Mario & Sonic at the London 2012 Olympic Games is released for the Wii and Nintendo 3DS in South Korea.
- 2019 — Sonic X Complete Series, a Blu-ray released by Discotek Media, is released in North America.