Anniversaries/October 18
From Sega Retro
October 18 (add)
- 1987 - The Sega Master System is released alongside the games Alien Syndrome, Mahjong Sengoku Jidai, and Haja no Fuuin in Japan.
- 1991 - Spider-Man vs. The Kingpin is released for the Sega Mega Drive in Japan.
- 1993 - Official Sega Genesis Power Tips Book Volume 2, a book, is released in North America.
- 1994 - Sonic & Knuckles is released for the Sega Mega Drive in North America, Europe, and Australia.
- 1996 - Last Bronx: Tokyo Bangaichi Soundtracks vs Club Remix, a CD, is released alongside Gambler Jiko Chuushinha: Tokyo Mahjongland, Oracle no Houseki, Langrisser III, and Mighty Hits for the Sega Saturn in Japan. Bottom of the 9th, Mr. Bones, Sega Worldwide Soccer 97, and Tetris Plus are released for the Sega Saturn alongside Sonic's Schoolhouse for Windows PCs in North America.
- 2000 - MTV Sports: Skateboarding Featuring Andy Macdonald and Spawn: In the Demon's Hand are released for the Sega Dreamcast in North America.
- 2001 - Minna de Puyo Puyo is released for the Game Boy Advance in Japan.
- 2002 - Sega Soccer Slam is released for the Nintendo Gamecube in Europe.
- 2004 - Disney Princesses: Suteki ni Lesson! Hiragana-Katakana is released for the Sega Pico in Japan. Sonic Underground The Complete Series, a DVD, is released in the United Kingdom.
- 2007 - Sonic Rush Adventure Original Soundtrack, a CD, is released alongside Seaman 2: Peking Genjin Ikusei Kit for the PlayStation 2 and Sonic Rush Adventure for the Nintendo DS in Japan. Sega Rally Revo is released for Windows PCs in Poland.
- 2011 - Double Rivals Attack Pack! and Double Super Hero Pack! are released for the PlayStation Portable in North America.
- 2012 - Sonic Jump is released for Android devices in Japan and for iOS in Japan, North America, Europe, and Australia. Viking: Battle for Asgard is released for Windows PCs in Poland.
- 2013 - Sonic Lost World is released for the Wii U in Europe and for the Nintendo 3DS in Europe, Australia, Hong Kong, and Taiwan.
- 2015 - For Brighter Day Phantasy Star Universe Original Soundtrack, Let the Winds Blow Phantasy Star Online Episode III C.A.R.D. Revolution Original Sound Track, Phantasy Star 0 Original Sound Track, Phantasy Star Online Songs of Ragol Odyssey: Soundtrack Episode 1 & 2, Phantasy Star Portable 2 Original Soundtrack: Wings of Universe, and Phantasy Star Universe: Illuminus no Yabou Original Soundtrack, are made available to download from Amazon in Japan.
- 2016 - Dead or Alive 5 Last Round is released for Sony's PlayStation Now service in Japan. Superdimension Neptune VS Sega Hard Girls Official Soundtrack, a CD, is released alongside the game it is for, Superdimension Neptune VS Sega Hard Girls, for the PlayStation Vita in North America.
- 2018 - Crash Bandicoot Buttobi 3-dan Mori! is released for the Nintendo Switch in Japan. Resonance of Fate: 4K/HD Edition is released for the PlayStation 4 in Japan and North America.
- 2020 - The Retro-Bit version of Zero Wing is released for the Sega Mega Drive alongside Golden Axed: A Cancelled Prototype for Steam in North America and Europe.