Anniversaries/May 31
From Sega Retro
May 31 (add)
- 1991 - The Teradrive is released alongside Puzzle Construction, Fire Mustang and Zero Wing are released for the Sega Mega Drive, and Ryukyu is released for the Sega Game Gear, all in Japan.
- 1994 - Triad Stone is released for the Sega Mega LD in North America.
- 1996 - Godzilla Rettoushinkan Koushiki Guide Book, a book, is released alongside both volumes of Sonic the Hedgehog, both VHSes, as well as Defcon 5, Dragon Ball Z Idainaru Dragon Ball Densetsu, Sword & Sorcery, and Wizardry VI & VII Complete for the Sega Saturn, all in Japan. Striker '96 and Virtual Open Tennis are released for the Sega Saturn in North America.
- 1998 - MeltyLancer Re-inforce Official Guide, a book, is released in Japan.
- 1999 - Get Bass Fishing Guide, a book, is released in Japan.
- 2000 - Cyber Troopers Virtual-On: Oratorio Tangram M.S.B.S. Ver. 5.4 is released for the Sega Dreamcast alongside the GameShark CDX for the Sega Dreamcast in North America.
- 2001 - Crazy Taxi 2, Exodus Guilty Neos, and Segagaga are released for the Sega Dreamcast alongside Hundred Swords for Windows PCs in Japan. Worms World Party is released for the Sega Dreamcast in North America. 18 Wheeler: American Pro Trucker and Confidential Mission are released for the Sega Dreamcast in Spain.
- 2002 - Super Monkey Ball and Virtua Striker 3 Ver. 2002 are released for the Nintendo Gamecube in France.
- 2003 - Dennou Senki Virtual-On Marz: The Complete Guide, a book, is released in Japan.
- 2006 - Billy Hatcher and the Giant Egg is released for Windows PCs in Europe.
- 2007 - Shining Wind Music Collection, a CD, is released alongside Zunzunkyou no Yabou for EZweb (BREW 3.1) compatible phones through Sega's Sega Ages portal, as well as Guilty Gear XX Accent Core and Jissen Pachinko Hisshouhou! CR Aladdin Destiny EX for the PlayStation 2 in Japan. Crush is released for the PlayStation Portable in Australia.
- 2012 - Jissen Pachi-Slot Hisshouhou! Hokuto no Ken F: Seikimatsu Kyuuseishu Densetsu is released for the PlayStation 3 in Japan.
- 2013 - 7th Dragon 2020-II Complete Guide, a book, is released in Japan. Warhammer 40,000: Dawn of War II: Retribution and Warhammer 40,000: Dawn of War II: Retribution - The Last Standalone are republished on Steam by Sega.
- 2017 - Crazy Taxi Gazillionaire is released for Android devices in North America, Europe, and Australia and for iOS in North America and Europe.