Anniversaries/October 20
From Sonic Retro
October 20 (add)
- 1999 — Issue #78 of the Sonic the Hedgehog comic series by Archie Comics is released in North America. Issue #167 of Sonic the Comic is released in the United Kingdom.
- 2005 — Sonic Kart 3DX is released for i-mode 90x compatible phones through Sega's Sonic Cafe portal in Japan.
- 2009 — Sonic Unleashed is made available for digital download on the Xbox 360 in North America and Europe.
- 2010 — Sonic Free Riders is released for the Xbox 360's Kinect add-on in Japan.