Anniversaries/September 13
From Sega Retro
September 13: Mortal Monday (add)
- 1991 - Galaxy Force II is released for the Sega Mega Drive in Japan.
- 1993 - Mortal Kombat is released for the Sega Mega Drive and Sega Game Gear, across North America and Europe (the latter also seeing a Sega Master System version). The LaserActive and Karaoke Microphone and Remote Control Unit accessories are released in North America.
- 1996 - Virtua Fighter Relax, a book, is released alongside Angel Paradise Vol. 2: Yoshino Kimika: Isshoni I-ta-i in Hawaii, Policenauts, and Ultraman Zukan for the Sega Saturn in Japan. Casper is released for the Sega Saturn in Europe.
- 1999 - Sonic Adventure: Official Strategy Guide, a book, is released alongside AeroWings for the Sega Dreamcast in North America.
- 2000 - Virtua Athlete 2000 is released for the Sega Dreamcast in North America.
- 2001 - Pro Yakyuu Team o Tsukurou! & Asobou! Complete Guide, a book, is released alongside Capcom vs. SNK 2 Millionaire Fighting 2001 and Cosmic Smash for the Sega Dreamcast in Japan.
- 2006 - Save This World: Phantasy Star Universe Original Score, a CD, is released in Japan.
- 2007 - Jissen Pachinko Hisshouhou! CR Sakura Taisen is released for the PlayStation 2 alongside Tama-Oh 2 for EZweb (BREW 3.1) compatible phones through Sega's Sonic Cafe portal, as well as Kaseki Play for Windows PCs in Japan. Alien Syndrome is released for the Wii and PlayStation Portable in Australia.
- 2008 - Viking: Battle for Asgard Official Strategy Guide, a book, is released in North America.
- 2010 - Alex Kidd in the Enchanted Castle, Bonanza Bros., Columns, Dr. Robotnik's Mean Bean Machine, Ecco Jr., Eternal Champions, Fatal Labyrinth, Galaxy Force II, Kid Chameleon, Ristar, Sonic the Hedgehog Spinball, and Super Thunder Blade are released on Steam in North America, Europe, and Australia.
- 2011 - Thor: God of Thunder is released for the Nintendo 3DS in North America. Comix Zone is released for the PlayStation 3 in South Korea.
- 2012 - Drama CD Puyo Puyo, a Drama CD, is released alongside Hatsune Miku: Project DIVA Dreamy Theater extend for the PlayStation 3, and Mekutte! Hitsuji Bokujou for iOS in Japan. Empire: Total War Gold Edition is released for Mac OS X in North America and Europe.
- 2014 - Dairantou Smash Brothers for Nintendo 3DS is released for the Nintendo 3DS in Japan.
- 2017 - Space Harrier II is made available for the Sega Forever service for Android devices in North America, Europe, and Australia. Sonic Mania is made available for digital download on the Nintendo eShop in South Korea and Hong Kong.
- 2018 - House of the Dead: Scarlet Dawn is released in Japanese Arcades for the ALLS UX board. Fate/Extella Link is released for the PlayStation 4 and PlayStation Vita in South Korea and Taiwan.
- 2022 - Sonic the Hedgehog Volume 12: Trial by Fire, a book, is released in North America and the United Kingdom.