Anniversaries/October 20
From Sega Retro
October 20 (add)
- 1985 - The Sega Mark III is launched for ¥15,000 alongside the games Hang-On and Teddy Boy Blues in Japan.
- 1990 - Arrow Flash is released for the Sega Mega Drive in Japan.
- 1994 - The Lawnmower Man, a Demo Disc, is released for the Sega Mega-CD in the United Kingdom while Mega Man: The Wily Wars is released for the Sega Mega Drive in Europe.
- 1995 - Virtua Fighter 2 Maniax, a book, is released alongside Gear Stadium Heiseiban for the Sega Game Gear, Virtua Fighter for the Super 32X, and Thunder Storm & Road Blaster, Tokimeki Mahjong Paradise: Koi no Tenpai Beat, The King of Boxing, and X Japan Virtual Shock 001 for the Sega Saturn in Japan. Micro Machines: Turbo Tournament '96 is released for the Sega Mega Drive in Japan.
- 1999 - Kidou Senkan Nadesico: Nadesico the Mission Chou Kimitsu Koushiki Guide Book, a book, is released alongside Baldur's Gate for Windows PCs in Japan. Prima's Official Strategy Guide: SoulCalibur, a book, is released in North America.
- 2000 - Urban Chaos is released for the Sega Dreamcast in North America. Star Wars: Episode I Jedi Power Battles is released for the Sega Dreamcast in Germany and the United Kingdom while Bangai-O, F355 Challenge, Giga Wing, and Sega Extreme Sports are released for the Sega Dreamcast in Europe. Power Stone 2 is released for the Sega Dreamcast in Australia.
- 2001 - Sega no Game wa Sekai Ichi~i~i~i! 2, a book, is released in Japan.
- 2004 - Sega Ages Sound Track The Best Plus, a CD, is released alongside Sakura Taisen: Le Nouveau Paris Vol.1, a VHS and DVD, in Japan.
- 2005 - Aka-chan wa Doko Kara Kuru no? is released for the Nintendo DS alongside Touhoku Daigaku Mirai Kagaku Gijutsu Kyoudou Kenkyuu Center Kawashima Ryuuta Kyouju Kanshuu: Nouryoku Trainer Portable for the PlayStation Portable, as well as Sonic Kart 3DX for i-mode 90x compatible phones through Sega's Sonic Cafe portal in Japan. Spartan: Total Warrior Official Strategy Guide, a book, is released alongside Shining Force Neo for the PlayStation 2 in North America.
- 2006 - Football Manager 2007 is released for Windows PCs in Poland and for Windows PCs and Mac OS X in Europe.
- 2009 - Sonic Unleashed is made available for digital download on the Xbox 360 in North America and Europe.
- 2010 - Sonic Free Riders is released for the Xbox 360's Kinect add-on in Japan. Video Games Live: Level 2 is made available for download from iTunes in North America. Vanquish is released for the PlayStation 3 in the Asia region.
- 2011 - Football Manager 2012 is released on Steam and for Mac OS X through Steam in North America and Europe. Captain America: Super Soldier is released for the Nintendo 3DS in Australia.
- 2015 - Dead or Alive 5 Ultimate is released for Sony's PlayStation Now service in Japan.
- 2022 - Sonic the Hedgehog: Imposter Syndrome, a book, is released in the United Kingdom.