Anniversaries/October 13
From Sonic Retro
October 13 (add)
- 1999 — Issue #31 of the comic series Knuckles the Echidna is released in North America.
- 2009 — Mario & Sonic at the Olympic Winter Games is released for the Nintendo DS and Wii in North America.
- 2010 — Sonic the Hedgehog 4 Episode I is released for the Xbox 360 in Japan, North America, and the United Kingdom, and for the PlayStation 3 in Europe and Australia. Issue #21 of Sonic Universe is released in North America.
- 2021 — Issue #45 of the Sonic the Hedgehog comic series by IDW Publishing is released in North America.