Anniversaries/September 13
From Sonic Retro
September 13 (add)
- 1999 — Sonic Adventure: Official Strategy Guide is published in North America.
- 2003 — "Sonic to the Rescue", the 2nd episode of Sonic X, airs in North America.
- 2010 — Sonic the Hedgehog Spinball and Dr. Robotnik's Mean Bean Machine are released on Steam in North America, Europe and Australia.
- 2014 — Super Smash Bros. for Nintendo 3DS is released for the Nintendo 3DS in Japan, featuring Sonic as a guest fighter.