Anniversaries/December 18
From Sonic Retro
December 18 (add)
- 1996 — Issue #44 of the Sonic the Hedgehog comic series by Archie Comics is released in North America.
- 2003 — Sonic Adventure DX: Director's Cut is released for Windows PCs in Japan.
- 2004 — "Sunblock Solution", the 40th episode of Sonic X, airs in North America.
- 2007 — Sonic Underground: The Greatest Hits, a CD, is released alongside Sonic Underground Vol. 1, a DVD, as well as Sonic the Hedgehog for the iPod in North America.
- 2008 — Sonic World Adventure is released for the Wii in Japan.
- 2012 — Sonic & All-Stars Racing Transformed is made available for digital download on the PlayStation Store in North America and released for the PlayStation Vita in Europe. Sonic the Fighters is released for the PlayStation 3 in South Korea and Taiwan.
- 2014 — Sonic Toon: Taiko no Hihou is released for the Wii U alongside Sonic Toon: Island Adventure for the Nintendo 3DS in Japan.