Anniversaries/July 31
From Sonic Retro
July 31 (add)
- 1996 — Sonic & Knuckles: Mecha Madness, the sixth stand-alone special from Archie Comics, is released in North America.
- 2013 — Issue #251 of the Sonic the Hedgehog comic series by Archie Comics and Best of Sonic the Hedgehog Villains, a trade paperback, are released in North America.
- 2018 — Sonic Forces Original Soundtrack - The Vinyl Cutz, a two-disc vinyl album, is released in Japan and Europe.
- 2019 — The first issue of Sonic the Hedgehog: Tangle & Whisper goes on sale in North America.
- 2024 — Issue #71 of the Sonic the Hedgehog comic series by IDW Publishing is released in North America.