From Sonic Retro
September 20 ():
- 2003 — "Missile Wrist Rampage", the 3rd episode of Sonic X, airs in the United States.
- 2013 — Sonic & Sega All-Stars Racing is released for Android in the United States and Europe.
- 2018 — Sega Ages Sonic the Hedgehog is released for the Nintendo Switch worldwide.