Anniversaries/October 31
From Sega Retro
October 31: Halloween (add)
- 1990 - S.S.T. Band Live!, a CD, is released in Japan.
- 1991 - Shougi no Hoshi is released for the Sega Mega Drive in Japan.
- 1995 - Unou Kaihatsu Series 2 Ecco Jr, Unou Kaihatsu Series 1 Richard Scarry's Huckle to Lowly, and Unou Kaihatsu Series 3 Hello Kitty no Machi e o-Dekake are released for the Sega Pico in Japan.
- 1996 - NetLink Custom Web Browser, Pro-Pinball, and True Pinball are released alongside the NetLink Internet Modem, NetLink Keyboard Adapter, and NetLink Mouse peripherals for the Sega Saturn in North America. Fighting Vipers is released for the Sega Saturn in the United Kingdom while Premier Manager 97 is released for the Sega Mega Drive alongside Virtua Cop for Windows PCs in Europe.
- 1997 - Chou Kouryakubon Game no Arukikata Books: Super Robot Taisen F, a book, is released in Japan. NHL 98 is released for the Sega Mega Drive in North America.
- 2000 - Atsumare! Guru Guru Onsen BB is released for the Sega Dreamcast in Japan. 4x4 Evolution, Jet Set Radio, KISS Psycho Circus: The Nightmare Child, NBA 2K1, and the Official Dreamcast Magazine demo disc that came with Issue #9 of Official Dreamcast Magazine are released in North America. Deep Fighter is released for the Sega Dreamcast in Australia.
- 2002 - Online Games: Dai Guru Guru Onsen is released for the PlayStation 2 alongside Guru Guru Onsen 2 for Windows PCs in Japan.
- 2003 - Sonic Pinball Party is released for the Game Boy Advance in the United Kingdom while Billy Hatcher and the Giant Egg and F-Zero GX are released for the Nintendo Gamecube alongside Worms 3D for the PlayStation 2, Nintendo Gamecube, Xbox, and Windows PCs in Europe.
- 2006 - Mind Quiz is released for the PlayStation Portable in North America.
- 2007 - Sakura Taisen New York Revue Show: Utau Dai New York 2, a CD for the stage play of the same name is released in Japan.
- 2008 - The Mega Drive Twin Pads, a console on a chip by AtGames, is released in the United Kingdom while Valkyria Chronicles is released for the PlayStation 3 in Europe.
- 2011 - Wan! Ted is released for EZweb (BREW 3.1) compatible phones through Sega's Puyo Puyo! Sega portal in Japan.
- 2012 - Border Break Nemesis Day, Border Break Union Ver. 3.0 Analyze Book, and WCCF 10th Anniversary Book, all books, are released alongside Sonic the Hedgehog 2 for the Nintendo 3DS Virtual Console in Japan. Ollie King Original Soundtrack is made available for download from Amazon and iTunes in North America. Ollie King Original Soundtrack is made available for download from Amazon and iTunes alongside The House of the Dead Bundle Pack for the PlayStation 3 in Europe.
- 2013 - Football Manager 2014 is released for Windows PCs in Europe.
- 2018 - Sega Ages Phantasy Star is released for the Nintendo Switch in Japan.
- 2019 - Persona 5 The Royal is released for the PlayStation 4 alongside Sega Ages Shinobi and Super Monkey Ball: Banana Blitz HD for the PlayStation 4 and Nintendo Switch in Japan. The Public Beta for Football Manager 2020 is released in Europe. Super Monkey Ball: Banana Blitz HD is released for the PlayStation 4 in South Korea and Taiwan.