From Sega Retro
March 21 (
- 1989 - Phantasy Star II: Kaerazaru Toki no Owari ni is released for the Mega Drive in Japan.
- 1990 - Penguin Land is released for the Game Boy in Japan.
- 1991 - Columns・Columns II, a CD, is released alongside Mickey Mouse no Castle Illusion for the Sega Game Gear in Japan.
- 1994 - Eternal Champions: Sega Genesis Official Power Guide, a book, is released in North America.
- 1997 - Hanasaku Otome, a CD, is released in Japan. Crypt Killer and Hexen are released for the Sega Saturn in Europe.
- 2000 - Rayman 2: The Great Escape is released for the Sega Dreamcast in North America.
- 2001 - Sakura Taisen 3 Hanagumi Roman Gahou, a book, is released alongside the Divers 2000 CX-1 Dreamcast, as well as ChuChu Rocket! for the Game Boy Advance as a launch title in Japan.
- 2002 - Keitai Kinematron is released for i-mode 503i compatible phones though Sega's Sakura Taisen Keitai Club portal, Sakura Taisen 4: Koi Seyo, Otome and Sakura Taisen Complete Box are released for the Sega Dreamcast, and Gunvalkyrie is released for the Xbox, all in Japan. NBA 2K2 and Phantasy Star Online Ver. 2 are released for the Sega Dreamcast in Spain.
- 2003 - Sonic Advance 2 is released for the Game Boy Advance alongside Panzer Dragoon Orta and Shenmue II for the Xbox in Europe.
- 2005 - Bingo Parade is released in Japanese Arcades for the Sega System SP board. Entsiklopediya igr Sega. 100000 sekrety, kody, paroli, a book, is released in Russia. The DVD of the first Volume of Sonic X is released in Australia.
- 2006 - House of the Dead II, a DVD, is released alongside The Tower SP for the Game Boy Advance in North America.
- 2007 - Puyo Puyo! Original Sound Track, a CD, is released alongside Puyo Puyo! for the PlayStation 2 and PlayStation Portable in Japan.
- 2008 - Sega Superstars Tennis is released for the Xbox 360 in Europe, Brain Assist releases for the Nintendo DS in Spain, Italy, and Australia, and Mystery Dungeon: Shiren the Wanderer releases for the Nintendo DS in France.
- 2013 - Dennou Senki Virtual-On: Marz is released on the PlayStation Network in Japan.
- 2016 - Total War Battles: Kingdom is released for iOS in North America and Europe.
- 2018 - Senjou no Valkyria 4 is released for the PlayStation 4 in Japan, South Korea, and Taiwan. Mega Marble World, an aftermarket Sega Mega Drive game is released in North America.