Anniversaries/December 26
From Sega Retro
December 26: Boxing Day (add)
- 1981 - Zaxxon is released in Japanese Arcades for the Sega Zaxxon hardware board.
- 1990 - Gaiares and Heavy Unit: Mega Drive Special are released for the Sega Mega Drive in Japan. The Genesis Speakers are given away in a promotion in North America.
- 1991 - Sangokushi II is released for the Sega Mega Drive in Japan.
- 1992 - Dream Team USA is released for the Sega Mega Drive in Japan. Ariel the Little Mermaid is released for the Sega Game Gear in Europe.
- 1993 - Crüe Ball is released for the Sega Mega Drive in Japan.
- 1997 - NASCAR 98 is released for the Sega Saturn in Spain.
- 1998 - Virtua Fighter 3tb Perfect Guide, a book, is released in Japan.
- 1999 - SoulCalibur Official Guide Book, a book, is released in Japan.
- 2000 - The Official Dreamcast Magazine demo disc that came with Issue #11 of Official Dreamcast Magazine is released in North America.
- 2002 - Musapey no Choco Marker, The King of Fighters 2001, and Yuki Gatari are released for the Sega Dreamcast alongside NFL 2K3 for the PlayStation 2 and Eternal Arcadia Legend for the Nintendo Gamecube in Japan.
- 2003 - Pro Yakyuu Team o Tsukurou! 2003 Complete Guide, a book, is released alongside Keitai Jiken Bo Challenge! Tantei Quiz for J-Sky (50KB) compatible phones through Sega's Pocket Works portal in Japan.
- 2006 - Melty Blood: Act Cadenza Version B is released in Japanese Arcades for the Sega NAOMI GD-ROM board.
- 2007 - Puyo Puyo Fever DX is released for Club Air-Edge compatible phones through Sega's Puyo Puyo! Sega portal in Japan.
- 2008 - World Destruction: Sekai Bokumetsu no Rokunin Vol. 4, a DVD, is released in Japan. The Sega Master System version of Sonic the Hedgehog 2 is released for the Wii Virtual Console in Europe.
- 2009 - Sakura Taisen Paris Hanagumi Live 2009: Moeagare Jiyuu no Tsubasa, a stage play, debuts in Japan.
- 2010 - Dennou Senki Virtual-On Force Masters Guide, a book, is released in Japan.
- 2011 - Shining Hearts Visual Settei Shiryoushuu, a book, is released in Japan.
- 2012 - Sakura Taisen New York Hoshigumi Live 2012: Dareka o Wasurenai Sekai De, a CD for the stage play of the same name, is released alongside Sakura Taisen Paris Hanagumi Live 2012: Revue Mon Paris, a stage play, debuting, and 3D Space Harrier for the Nintendo 3DS in Japan. Rhythm Thief & the Emperor's Treasure is released for the Nintendo 3DS in South Korea.
- 2015 - Genei Ibunroku ♯FE is released for the Wii U in Japan.
- 2019 - Phantasy Star Online 2 Fashion Catalog 2018-2019 Stars and Guardians, a book, is released in Japan.