Anniversaries/September 29
From Sonic Retro
September 29 (add)
- 1999 — Issue #11 of the Sonic Super Special comic series is released in North America.
- 2010 — Sonic Adventure is released for the Xbox 360 and PlayStation 3 in Japan, South Korea, and Taiwan.
- 2021 — Sonic Colors: Ultimate Original Soundtrack "Re-Colors", an album, is released on CD in Japan.