From Sonic Retro
February 14 (
- 1997 — Sonic & Knuckles Collection is released for the PC in Japan.
- 2012 — Mario & Sonic at the London 2012 Olympic Games is released for the Nintendo 3DS in the United States.
- 2019 — drx releases a prototype of Sonic the Hedgehog 2 for the Sega Mega Drive that was originally leaked by CENSOR before the game's release.
- 2020 — The Sonic the Hedgehog film premieres in theaters in North America and Europe.