Anniversaries/September 21
From Sega Retro
September 21 (add)
- 1986 - The Circuit is released for the Sega Master System in Japan.
- 1991 - Bare Knuckle, a CD, is released in Japan.
- 1993 - Fantastic Dizzy is released for the Sega Mega Drive and Sega Game Gear in North America.
- 1995 - Panzer Dragoon Power Remix, a CD, is released in Japan. Shinobi Legions is released for the Sega Saturn in North America.
- 1996 - Sega Official Video Library Vol. 6: NiGHTS into Dreams, a VHS, is released in Japan.
- 1999 - Pro Yakyuu Team o Tsukurou! Perfect Guide, a book, is released in Japan. Puyo Pop is released for the Neo Geo Pocket Color in North America.
- 2000 - DeSpiria Koushiki Kouryaku Guide, a book, is released alongside the game it is for, deSpiria, as well as Sakura Taisen 2: Kimi, Shinitamou Koto Nakare for the Sega Dreamcast in Japan. ESPN International Track & Field is released for the Sega Dreamcast in France. Virtua Tennis is released for the Sega Dreamcast in Australia.
- 2001 - Plarail Pico: Plarail de Asobou! is released for the Sega Pico in Japan.
- 2004 - Phantasy Star is released for i-mode 90x compatible phones through Sega's Sonic Cafe portal in Japan. Blood Will Tell: Tezuka Osamu's Dororo is released for the PlayStation 2 alongside Headhunter Redemption for the PlayStation 2 and Xbox in North America.
- 2006 - Full Spectrum Warrior 2: Ten Hammers and Sakura Taisen Premium Edition are released for Windows PCs in Japan.
- 2010 - Sonic Adventure is released for the PlayStation 3 in North America.
- 2011 - Senjou no Valkyria 2 Part 2, a book, is released alongside Pachislot Sakura Taisen 3 Original Soundtrack being made available to download from Amazon, iTunes, and the Mora streaming platform in Japan. Altered Beast is released for the PlayStation 3 in Europe, Australia, and Taiwan.
- 2012 - Sakura Taisen Teikoku Kagekidan OVA BD-Box, a Blu-ray, is released in Japan.
- 2015 - Ghost Blade, an aftermarket Sega Dreamcast game, is released in Europe.
- 2021 - Sonic Boom Season 2, a Blu-ray, is released in North America.
- 2023 - Sonic Superstars Start Book, a book, is given out at Tokyo Game Show 2023 for free.