Anniversaries/October 25
From Sonic Retro
October 25 (add)
- 1991 — Sonic the Hedgehog is released for the Sega Master System in Europe.
- 1993 — Sonic Chaos is released for the Sega Master System in Europe.
- 2003 — "Satellite Swindle", the 8th episode of Sonic X, airs in North America.
- 2004 — Sonic Gammon is released for i-mode 504i and i-mode 505i compatible phones through Sega's Sonic Cafe portal in Japan.
- 2018 — Sonic the Hedgehog Tome 1: Le hérisson contre-attaque, the first trade paperback of the Sonic the Hedgehog comic series by IDW Publishing, is released in France.
- 2021 — Dr. Robotnik's Mean Bean Machine and Sonic the Hedgehog 2 are released for the Nintendo Switch Online service for the Nintendo Switch in North America.
- 2022 — Sonic the Hedgehog: The Official Color by Sticker Book and Sonic the Hedgehog: The Official Coloring Book, both books, are released in North America.