| Memories Off Mix | 2003 | ps2 |
| Memories Off: Innocent Fille | 2018 | ps4, switch, vita |
| Men at Work! 3 - Ai to Seishun no Hunter Gakuen | 2004 | ps2 |
| The Men of Yoshiwara: Ohgiya | 2018 | switch |
| Menghuan Shalou | 2006 | nes |
| Mercurius Pretty - End of the Century | 2000 | dreamcast |
| Mermaid Gothic | 2014 | psp |
| Mermaid Prism | 2006 | ps2 |
| Mermaid no Kisetsu | 2001 | ps1 |
| Metal Fighter Miku | 1995 | saturn |
| Metal Gear Solid - Bande Dessinee | 2006 | psp |
| Metal Gear Solid - Peace Walker | 2010 | psp |
| Metal Gear Solid - Portable Ops | 2006 | psp |
| Metal Gear Solid - Portable Ops Plus | 2007 | psp |
| Metal Gear Solid 2 - Sons of Liberty - HD Edition | 2011 | ps3, vita |
| Metal Max Xeno Reborn | 2020 | switch |
| Metal Slader Glory | 1991 | nes |
| Metal Slader Glory | 2015 | wiiu |
| Metal Slader Glory - Director's Cut | 2000 | snes |
| Metal Wolf | 2002 | dreamcast |
| Metal Wolf REV | 2006 | ps2 |
| Metamor Panic - Doki Doki Youma Busters!! | 1995 | ps1 |
| Metroid | 1986 | arcade, fds |
| Mhakna Gramura and Fairy Bell | | ps4 |
| Miami Law | 2009 | nds |
| Michigan | 2004 | ps2 |
| Michigan - Report from Hell | 2005 | ps2 |
| Midori no Makibao - Kuroi Inazuma Shiroi Kiseki | 1998 | ps1 |
| Mighty Max | 1995 | snes |
| Mikagura Shoujo Tanteidan | 1998 | ps1 |
| Mikeneko Holmes - Ghost Panic | 2001 | wsc |
| Mikeneko Holmes no Kishidou | 1991 | gb |
| Mikomai - Towa no Omoi | 2005 | ps2 |
| Milky Way Prince: The Vampire Star | 2022 | switch |
| Mimpi Dreams | 2018 | switch |
| Minakata Hakudou Toujou | 1997 | ps1, saturn |
| Minami no Umi no Odyssey | 2002 | gba |
| Minarai Majo to MocoMoco Friends | 2015 | 3ds |
| Mindseeker | 1989 | nes |
| Minecraft - Story Mode - A Telltale Games Series - The Complete Adventure | 2016 | wiiu |
| Minecraft - Story Mode - Season Two - The Telltale Series | 2017 | xbox360 |
| Minecraft: Story Mode | 2015 | ps4, switch, xboxone |
| Minecraft: Story Mode - Season 2 | 2017 | ps4, switch, xbox360, xboxone |
| Mini Moni. - Mika no Happy Morning Chatty | 2002 | gba |
| Mini Yonku Shining Scorpion - Let's & Go!! | 1996 | snes |
| Mini-Games Madness Volume #1 - Hello World | 2016 | wiiu |
| Minimum Nanonic | 1997 | pcfx |
| Ministry of Broadcast | 2020 | switch |
| Minit | 2018 | switch, xboxone |
| Minna no Shiiku Series - Boku no Kabuto, Kuwagata | 2003 | gba |
| Minna no Shiiku Series 1 - Boku no Kabutomushi | 2001 | gba |
| Minna no Shiiku Series 2 - Boku no Kuwagata | 2001 | gba |
| Minton Keibu no Sousa File - Doukeshi Satsujin Jiken | 1997 | ps1, saturn |
| Mirai Nikki - 13-Ninme no Nikki Shoyuusha | 2010 | psp |
| Mirai Nikki - 13-Ninme no Nikki Shoyuusha Re-Write | 2012 | psp |
| Mischief Makers | 1997 | n64 |
| Misfortune Advance | | gba |
| Miss Moonlight | 2001 | dreamcast |
| Misshitsu no Sacrifice | 2010 | psp |
| Missing Blue | 2001 | ps2 |
| Missing Parts - The Tantei Stories | 2002 | dreamcast |
| Missing Parts 2 - The Tantei Stories | 2002 | dreamcast |
| Missing Parts 3 - The Tantei Stories | 2003 | dreamcast |
| Missing Parts Side A - The Tantei Stories | 2003 | ps2 |
| Missing Parts Side B - The Tantei Stories | 2007 | ps2 |
| Missing Parts the Tantei Stories Complete | 2012 | psp |
| Mississippi Satsujin Jiken | 1986 | nes |
| Mistonia no Kibou: The Lost Delight | 2024 | switch |
| Miteha Ikenai | 2004 | nds |
| Mitsu x Mitsu Drops - Love x Love Honey Life | 2006 | ps2 |
| Mitsubachi Gakuen | 1990 | pcengine |
| Mitsume ga Tooru | 1992 | nes |
| Miyako | 2010 | psp |
| Miyako - Awayuki no Utage | 2012 | psp |
| Mizu no Senritsu | 2005 | ps2, psp |
| Mizu no Senritsu 2 - Hi no Kioku | 2006 | ps2, psp |
| Mizuiro | 2002 | dreamcast, ps2 |
| Moco Moco Friends | 2015 | 3ds |
| Modern Tales: Age of Invention | 2019 | ps4, xboxone |
| Moe Moe 2-Ji Taisen-Ryaku Deluxe | | psp |
| Moegaku @ Portable | 2006 | psp |
| Moekan | 2003 | dreamcast |
| Moekan - Moekko-jima e Youkoso | 2004 | ps2 |
| Moero Chronicle Hyper | 2019 | switch |
| Mom Hid My Game! | 2017 | switch |
| Momoc | 2019 | nes |
| MonHun Nikki - Poka Poka Ailu Mura DX | 2015 | 3ds |
| Monkey Island - Special Edition Collection | 2011 | ps3, xbox360 |
| Monkey Island 2 - LeChuck's Revenge - Special Edition | 2010 | xbox360 |
| Monobeno - Pure Smile | 2014 | vita |
| Monochrome | 2004 | ps2 |
| Monochrome | 2010 | psp |
| Monochrome Factor - Cross Road | 2008 | ps2 |
| Monster Farm 4 | 2003 | ps2 |
| Monster High - Ghoul Spirit | 2011 | nds, wii |
| Monster High - New Ghoul in School | 2015 | 3ds, ps3, wii, wiiu |
| Monster High - New Ghoul in School | 2015 | xbox360 |
| Monster Hunter Stories | 2016 | 3ds |
| Monster Prom: XXL | 2020 | switch |
| Monster Radar Plus | 2012 | vita |