From Sonic Retro
January 27 (
- 1999 — Issue #69 of the Sonic the Hedgehog comic series by Archie Comics is released in North America. Issue #148 of Sonic the Comic is released in the United Kingdom.
- 2003 — Sonic Putter is released for i-mode 503i compatible phones though Sega's Sonic Cafe portal in Japan.
- 2004 — Sonic Heroes is released for the PlayStation 2 and Xbox in North America.
- 2010 — Volume 12 of Sonic the Hedgehog Archives, a trade paperback, is released in North America.