From Sonic Retro
January 25 (
- 1995 — Sonic Spinball is released for the Sega Master System in Europe and Brazil.
- 2004 — "Kaden Dai Panic!!", the 43rd episode of Sonic X, airs in Japan.
- 2006 — Issue #158 of the Sonic the Hedgehog comic series by Archie Comics is released in North America.
- 2007 — Sonic Panel Puzzle is released for EZweb (BREW 3.1) compatible phones though Sega's Sonic Cafe portal in Japan.
- 2012 — Sonic the Hedgehog 4 Episode I is released for Android devices in North America, Europe, and Australia.
- 2018 — Sonic Adventure 2 Official Soundtrack Vinyl Edition, a vinyl album, is released in North America.
- 2021 — Sonic the Hedgehog Volume 3: Battle For Angel Island, the third trade paperback of the Sonic the Hedgehog comic series by IDW Publishing is released in Japan.