Anniversaries/June 20
From Sega Retro
June 20 (add)
- 1990 - Phantasy Star III: Toki no Keishousha Koushiki Guide Book, a book, is released in Japan.
- 1993 - Switch Koushiki Guide Book, a book, is released in Japan.
- 1995 - Virtua Fighter 2 Act.2, a book, is released in Japan.
- 1996 - Triple Play: Gold Edition is released for the Sega Mega Drive in North America. Guardian Heroes is released for the Sega Saturn in Europe.
- 1997 - AMOK, Digital Ange: Dennou Tenshi SS, Magical Drop III Toretate Zoukangou!, Marica: Shinjitsu no Sekai, PGA Tour 97, Private Idol Disc Tokubetsu Hen Campaign Girl '97, Sonic Jam, Waku Waku 7, and Zero4 Champ DooZy-J Type-R are released for the Sega Saturn in Japan.
- 1998 - Waku Waku Puyo Puyo Dungeon Koushiki Kouryakuhon, a book, is released in Japan.
- 2000 - Fish Life is released in Japanese arcades. Draconus Cult of the Wyrm is released for the Sega Dreamcast in North America.
- 2001 - Sonic Adventure 2: Prima's Official Strategy Guide, a book, is released alongside Stupid Invaders for the Sega Dreamcast in North America. Evil Dead: Hail to the King is released for the Sega Dreamcast in France and Germany.
- 2003 - Drive Pico: Go Go! Car Navi Touring! is released for the Sega Pico in Japan. Sonic Adventure DX: Director's Cut is released for the Nintendo Gamecube in Australia.
- 2007 - Woody Pop is released for i-mode 90x compatible phones through Sega's Sega Ages portal.
- 2008 - The Incredible Hulk is released for the PlayStation 3 in Europe.
- 2013 - Shining Force Cross Exlesia is released in Japanese Arcades for the Sega RingEdge board. Sonic Blast is released for the Nintendo 3DS Virtual Console in North America. Puzzle Pirates is released for the iPad alongside Defenders of Oasis and Tails Adventures for the Nintendo 3DS Virtual Console in North America and Europe.
- 2018 - Puyo Puyo Tetris S is released for the Nintendo Switch in Hong Kong. Sonic Forces is made available for digital download on the Nintendo eShop in South Korea.
- 2019 - An aftermarket version of Advanced Busterhawk Gley Lancer is released for the Sega Mega Drive in Japan. Ryu ga Gotoku 5: Yume, Kanaeshi Mono is released for the PlayStation 4 in Japan, South Korea, and Taiwan.