| Maria the Witch | 2017 | switch, xboxone |
| Marie-Antoinette and the Disciples of Loki | 2004 | nds |
| Mario & Luigi RPG - Paper Mario MIX | 2015 | 3ds |
| Mario & Luigi RPG - Siganui Partner | 2010 | nds |
| Mario & Luigi RPG 4 - Dream Adventure | 2013 | 3ds |
| Marionette Company | 1999 | dreamcast, ps1 |
| Marionette Company 2 Chu! | 2000 | dreamcast, ps1 |
| Marmalade Boy | 1995 | snes |
| Marriage Royale - Prism Story | 2010 | psp |
| Mars Moose Adventure - WalkAbout 3 - World Sports Day | 1996 | ps1 |
| Mars Moose Cosmic Quest 1 - City Sights | 1996 | ps1 |
| Mars Moose Stay and Play 2 - In Mars' Bedroom | 1996 | ps1 |
| Marusa no Onna | 1989 | nes |
| Mary Shelley's Frankenstein | 1994 | genesis, snes |
| Mary-Kate & Ashley - Get a Clue! | 2000 | gbc |
| Mashiroiro Symphony - Mutsu-no-hana | 2011 | psp |
| Master Detective Archives: Rain Code | 2023 | switch |
| Masuzoe Youichi - Asa Made Famicom | 1992 | nes |
| Matantei Loki Ragnarok - Mayouga - Ushinawareta Bishou | 2005 | ps2 |
| Mato Kurenai Yuugekitai - Daybreak Special Gigs | 2015 | vita |
| Matou no Houkai - The Hero of Babel | 1988 | fds |
| Maverick's Baghdad Extraction | 2025 | nes |
| May's Mysteries - The Secret of Dragonville | 2011 | nds |
| May's Mystery - Forbidden Memories | 2011 | nds |
| McDonald's Monogatari - Honobono Tenchou Ikusei Game | 2001 | gbc |
| Me & My Katamari | 2006 | psp |
| Mechanika | 2018 | xboxone |
| Medabots - Metabee | 2015 | wiiu |
| Medabots - Rokusho | 2015 | wiiu |
| Medarot Ni Core - Kuwagata Version | 2016 | wiiu |
| MediEvil Resurrection | 2005 | psp |
| Medical 91 | 2005 | ps2 |
| Medical91 for Portable | | psp |
| Meebzork | 1983 | a5200 |
| Meer Duistere Fabels van Aesopus | 1992 | cdi |
| Mega Casanova | 2019 | genesis |
| Mega Casanova 2 | 2021 | genesis |
| Mega Casanova 3 | 2022 | genesis |
| Mega Man Battle Network 5 - Double Team DS | 2005 | nds |
| Mei Puru | 2002 | dreamcast |
| Meiji Ishin | 1989 | nes |
| Meiji Tokyo Renka | 2013 | psp |
| Meiji Tokyo Renka - Twilight Kiss | 2015 | psp |
| Meikyuu no Tatsujin - Daimeiro | 1990 | nes |
| Meitantei Conan | 1998 | ps1 |
| Meitantei Conan & Kindaichi Shounen no Jikenbo - Meguriau Futari no Meitantei | 2009 | nds |
| Meitantei Conan - 3-nin no Meisuiri | 2000 | ps1 |
| Meitantei Conan - Akatsuki no Monument | 2005 | gba |
| Meitantei Conan - Chika Yuuenchi Satsujin Jiken | 1996 | gb |
| Meitantei Conan - Daiei Teikoku no Isan | 2004 | ps2 |
| Meitantei Conan - Giwaku no Gouka Ressha | 1998 | gb |
| Meitantei Conan - Kako Kara no Zensou Kyoku | 2012 | nds |
| Meitantei Conan - Kako kara no Prelude | 2012 | psp |
| Meitantei Conan - Kakokara no Prelude | | psp |
| Meitantei Conan - Karakuri Jiin Satsujin Jiken | 2000 | gbc |
| Meitantei Conan - Kieta Hakase to Machigai Sagashi no Tou | 2008 | nds |
| Meitantei Conan - Kigantou Hihou Densetsu | 2000 | gbc |
| Meitantei Conan - Marionette Symphony | 2013 | 3ds |
| Meitantei Conan - Nerawareta Tantei | 2003 | gba |
| Meitantei Conan - Norowareta Kouro | 2001 | gbc |
| Meitantei Conan - Saikou no Partner | 2002 | ps1 |
| Meitantei Conan - Yuugure no Oujo | 2001 | wsc |
| Meitantei Holmes - Kiri no London Satsujin Jiken | 1988 | nes |
| Meitantei Holmes - M kara no Chousenjou | 1989 | nes |
| Meitantei Pikachu | 2018 | 3ds |
| Meitantei Pikachu - Shin Combi Tanjou | 2018 | 3ds |
| Melanie and the Magic Forest | 2022 | gbc |
| Melty Blood: Type Lumina | 2021 | ps4, switch, xboxone |
| MeltyMoment | | vita |
| A Memoir Blue | 2022 | ps4, switch, xboxone |
| Memorial Song | 2002 | ps2 |
| Memories Off | 1999 | ps1 |
| Memories Off | 2008 | psp |
| Memories Off - After Rain Vol. 1 - Orizuru | 2005 | ps2 |
| Memories Off - After Rain Vol. 2 - Souen | 2005 | ps2 |
| Memories Off - After Rain Vol. 3 - Sotsugyou | 2005 | ps2 |
| Memories Off - Festa | 2001 | wsc |
| Memories Off - Innocent Fille for Dearest | 2019 | vita |
| Memories Off - Pure | 2000 | ngpc |
| Memories Off - Sorekara | 2004 | ps2 |
| Memories Off - Sorekara | 2008 | psp |
| Memories Off - Sorekara Again | 2006 | ps2 |
| Memories Off - Sorekara Again | 2009 | psp |
| Memories Off - Yubikiri no Kioku | 2010 | ps3, psp, vita, xbox360 |
| Memories Off - Yubikiri no Kioku - Futari no Fuuryuuan | | psp |
| Memories Off 2nd | 2001 | dreamcast |
| Memories Off 2nd | 2001 | ps1 |
| Memories Off 2nd | 2008 | psp |
| Memories Off 2nd - Promotion Disc | 2001 | dreamcast |
| Memories Off 5 - Togireta Film | 2005 | ps2 |
| Memories Off 5 - Togireta Film | 2009 | psp |
| Memories Off 5 Encore | 2007 | ps2 |
| Memories Off 5 Encore | 2009 | psp |
| Memories Off 6 - Next Relation | 2009 | ps2, psp, xbox360 |
| Memories Off 6 - T-Wave | 2008 | ps2, psp, xbox360 |
| Memories Off 6 Complete | 2013 | ps3, vita |
| Memories Off Complete | 2000 | dreamcast |
| Memories Off Duet - 1st & 2nd Stories | 2003 | ps2 |
| Memories Off Historia Vol. 1 | 2021 | ps4, switch |
| Memories Off Historia Vol. 2 | 2021 | ps4, switch |