Anniversaries/December 13
From Sega Retro
December 13 (add)
- 1987 - Tri Formation is released for the Sega Master System in Japan.
- 1991 - NHK Taiga Drama: Taiheiki is released for the Sega Mega Drive alongside Arliel: Crystal Densetsu for the Sega Game Gear in Japan.
- 1996 - Sakura Taisen Genga & Settei Shiryoushuu, a book, is released alongside G Sonic for the Sega Game Gear, Battle Athletess Daiundoukai, Daisenryaku Pack, Discworld, Enemy Zero, Funky Fantasy, Jikkyou Oshaberi Parodius: Forever With Me, MeltyLancer: Ginga Shoujo Keisatsu 2086, Panzer Dragoon I & II, Shusse Mahjong Daisettai, Space Invaders, and Tactics Ogre for the Sega Saturn, as well as Ecco the Dolphin for Windows PCs in Japan.
- 2000 - Resident Evil 2 and The King of Fighters: Evolution are released for the Sega Dreamcast in North America.
- 2001 - Saka Tsuku Tokudaigou 2: J.League Pro Soccer Club o Tsukurou! is released for the Sega Dreamcast alongside Columns Crown for the Game Boy Advance, as well as Sonic Tennis being released for i-mode 503i compatible phones through Sega's Sonic Cafe portal in Japan.
- 2002 - Azumanga Daioh Puzzle Bobble is released in Japanese Arcades for the Sega NAOMI GD-ROM board.
- 2006 - Sakura Taisen Zenkyokushuu 2002-2006, a CD, is released in Japan.
- 2007 - MJ3 Evo DVD Mahjong Juku 5-kan and MJ3 Evo DVD Mahjong Juku 6-kan, both DVDs, are released alongside Sangokushi Taisen 3 in Arcades for the Sega Lindbergh board alongside NiGHTS: Hoshi Furu Yoru no Monogatari for the Wii in Japan. The Golden Compass is released for the PlayStation 2, Wii, PlayStation 3, Nintendo DS, PlayStation Portable, and Windows PCs in Australia.
- 2012 - Phantasy Star Online 2 Master Guide Book, a book, is released alongside Drama CD Puyo Puyo Vol. 2, a Drama CD, maimai Plus in Arcades for the Sega RingEdge 2 board, Football Manager Handheld 2013 for Android devices and iOS, and Rusty Hearts for Windows PCs in Japan. Shinobi is made available for digital download on the PlayStation Store in South Korea. Football Manager Handheld 2013 is released for Android devices and iOS in North America and Europe.
- 2013 - Sonic the Hedgehog 2 is released for Android devices and iOS in Japan.
- 2017 - Sonic Forces Original Soundtrack - A Hero Will Rise and Sonic Forces Vocal Traxx - On the Edge, both CDs, are released physically in Japan and made available to download for iTunes and the Mora streaming platform in Japan and made available to download for Amazon, Google Play, and iTunes in North America and Europe.
- 2018 - Judge Eyes: Shinigami no Yuigon Original Soundtrack, a CD, is released alongside the game it is for, Judge Eyes: Shinigami no Yuigon, in Japan. Sega Ages Phantasy Star is released for the Nintendo Switch in North America and Europe alongside Judge Eyes: Shinigami no Yuigon for the PlayStation 4 in South Korea and Taiwan.