Anniversaries/September 1
From Sonic Retro
September 1 (add)
- 1993 — Sonic the Hedgehog 1 & 2 Hisshou Kouryakuhou, a book, is released in Japan.
- 2004 — Issue #140 of the Sonic the Hedgehog comic series by Archie Comics is released in North America.
- 2005 — Sonic X Megapack 2, a DVD, is released in Germany. Knuckles the Echidna in Sonic the Hedgehog, a seminal work in the history of Sonic the Hedgehog ROM hacks, is released online.
- 2021 — Issue #43 of the Sonic the Hedgehog comic series by IDW Publishing is released in North America.