| Nihon Daihyou Team no Kantoku ni Naruu! Sekaihatsu Soccer RPG - Become the Coach for the National Team! | 1998 | saturn |
| Nihon Sumou Kyoukai Kounin - Nihon Oozumou | 2000 | ps1 |
| Nile-gawa no Yoake | 1998 | saturn |
| Ninja Village | 2020 | ps4 |
| Nintendo Labo - Toy-Con 03: Vehicle Kit | 2018 | switch |
| Nintendogs + Cats - French Bulldog & New Friends | 2011 | 3ds |
| Nintendogs + Cats - Shiba & New Friends | 2013 | 3ds |
| Nintendogs + Cats - Toy Poodle & New Friends | 2011 | 3ds |
| Nintendogs - Chihuahua & Friends | 2005 | nds |
| Nintendogs - Dachshund & Friends | 2005 | nds |
| Nintendogs - Labrador & Chingudeul | 2007 | nds |
| Nintendogs - Shiba & Friends | 2005 | nds |
| Nobunaga no Yabou - Bushou Fuuunroku | 1991 | genesis |
| Nobunaga no Yabou - Reppuuden | 1999 | dreamcast, ps1 |
| Norman's Great Illusion | 2020 | vita |
| Notam of Wind | 1997 | ps1 |
| Nour: Play with Your Food | 2023 | ps4 |
| Nuga-Cel! Nurture Garment Celebration | 2009 | ps2 |
| Nursery Mania | 2010 | nds |
| Nyan to Wonderful | 1996 | ps1 |
| Ochaken Kururin - Honwaka Puzzle de Hotto Shiyo | 2004 | gba |
| Ochaken no Daibouken 2 - Yume Ippai no Omocha Bako | 2008 | nds |
| Ochaken no Heya | 2003 | gba |
| Ochaken no Heya DS | 2006 | nds |
| Ochaken no Heya DS 2 | 2007 | nds |
| Ochaken no Heya DS 3 | 2008 | nds |
| Octodad: Dadliest Catch | 2014 | ps4, switch, vita, wiiu, xboxone |
| Offshore Tycoon | 2009 | wii |
| Oh! Edo Towns | 2020 | ps4 |
| Oh...Sir!! The Insult Simulator | 2017 | xboxone |
| Ohanaya-san Monogatari GBA - Iyashikei Ohanaya-san Ikusei Game | 2002 | gba |
| Oide Rascal | 2001 | gbc |
| Omerta - City of Gangsters | 2013 | xbox360 |
| Omizu no Hanamichi | 2000 | ps1 |
| On Your Tail | 2024 | switch |
| One Word by POWGI | 2018 | vita |
| Oneesan to Issho! Kisekae Paradise | 1995 | 3do |
| Ooblets | 2022 | switch |
| Ooedo Renaissance | 1997 | saturn |
| Operation Air Assault | 2005 | ps2 |
| Operation Air Assault 2 | 2007 | ps2 |
| Operation Armored Liberty | 2003 | gba |
| Orange Season | 2024 | switch |
| Order Up! | 2008 | 3ds, ps3, wii |
| Order!! | 2009 | wii |
| Ore ga Kantoku da! Gekitou Pennant Race | 2000 | ps2 |
| Ore ga Kantoku da! Volume 2 - Gekitou Pennant Race | 2002 | ps2 |
| Ore ni Hatarakette Iwaretemo - Tori | 2016 | vita |
| Ore ni Hatarakette Iwaretemo Otsu HD | 2014 | vita |
| Ore no Ryouri | 1999 | ps1 |
| Ore no Shikabane o Koete Yuke | 1999 | ps1, psp |
| Ore no Yotto - Ganbare! Nippon Challenge | 1999 | ps1 |
| Ore-Sama Kingdom - Koi mo Manga mo Debut o Mezase! Doki Doki Love Lesson | 2011 | nds |
| The Oregon Trail | 2011 | 3ds |
| The Oregon Trail | 2011 | wii |
| Osaka Naniwa Matenrou | 1999 | ps1 |
| Oshare Wanko | 2004 | gba |
| Oshare de Kawaii! Koinu to Asobo! Machi-Hen | 2013 | 3ds |
| Oshare de Kawaii! Koinu to Asobo! Umi-Hen | 2013 | 3ds |
| Oshare na Koinu DS | 2011 | nds |
| Otogi Story - Tenshi no Shippo | 2003 | ps1 |
| Otome-teki Koi Kakumei - Love Revo!! | 2006 | ps2 |
| Ouka Houshin - Ouka Sakishi Toki | 1999 | dreamcast |
| Our House | 2009 | nds |
| Outback Pet Rescue 3D | 2014 | 3ds |
| Over G Fighters | 2006 | xbox360 |
| Overcooked! Special Edition | 2017 | switch |
| P.T.O. - Pacific Theater of Operations II | 1996 | saturn |
| P.T.O. II - Pacific Theater of Operations | 1995 | snes |
| PAQA | 1999 | ps1 |
| PC Building Simulator | 2019 | ps4, switch, xboxone |
| PGA European Tour | 1995 | gb |
| Paard & Pony - Mijn Paardenstal - Al Jouw Ruiterdromen Komen Uit! | 2008 | wii |
| Pacific Liberator | 2009 | wii |
| Pacific Warriors II - Dogfight! | 2004 | ps2, ps3 |
| Paint by DS | 2006 | nds |
| Panzer Front Ausf.B | 2004 | ps2 |
| Panzer Front bis | 2001 | ps1 |
| Pao Leeming Kanshuu - Fuusui Nyuumon | 2001 | ps1 |
| Paparazzi | 2004 | ps2 |
| Parkasaurus | 2022 | switch |
| Party Crasher Simulator | | ps4 |
| Party Crasher Simulator | | xboxone |
| Pawly Pets - My Pet Hotel | 2004 | nds |
| Pawly Pets - My Vet Practice | 2007 | nds |
| Paws & Claws - Best Friends - Dogs & Cats | 2006 | gba, nds |
| Paws & Claws - Pampered Pets | 2009 | nds |
| Paws & Claws - Pampered Pets Resort 3D | 2012 | 3ds |
| Paws & Claws - Pet Resort | 2006 | gba |
| Paws & Claws - Pet Resort | 2008 | nds |
| Paws & Claws - Pet Resort | 2009 | wii |
| Paws & Claws - Pet Vet | 2006 | gba, nds |
| Paws & Claws - Pet Vet | 2007 | nds |
| Paws & Claws - Pet Vet 2 | 2007 | nds |
| Paws & Claws - Regal Resort | 2010 | nds |
| Pearl Harbor - Episode 1 - Red Sun Rising | 2010 | wii |
| Penguin Seikatsu | 2010 | wii |
| Perfect Woman | 2016 | xboxone |
| Pet Club - Inu Daisuki! | 1996 | gg |
| Pet Pals - Animal Doctor | 2008 | nds, wii |