| Ken to Mahou to Gakuen Mono. 3D | 2011 | 3ds |
| Ken to Mahou to Gakuen Mono. Final - Shinnyuusei wa Ohimesama! | 2011 | psp |
| Kentoushi - Gladiator Begins | 2010 | psp |
| Kenyuu Densetsu Yaiba | 1994 | gb |
| Kero Kero Keroppi no Bouken Nikki - Nemureru Mori no Keroleen | 1994 | snes |
| Keroro RPG - Kishi to Musha to Densetsu no Kaizoku | 2010 | nds |
| Kessen - Demo Video CD-ROM | 1999 | ps1 |
| Key of Heaven | 2005 | psp |
| Khamrai | 2000 | ps1 |
| Kidou Keisatsu Patlabor | 1994 | snes |
| Kidou Senshi Gundam - Gihren no Yabou - Zeon no Keifu - Kimitsu Eizou Disc Tokubetsu-hen | 1999 | ps1 |
| Kidou Senshi Gundam AGE - Cosmic Drive | 2012 | psp |
| Kidou Senshi Gundam AGE - Universe Accel | 2012 | psp |
| Kidou Senshi Gundam Seed Destiny - Generation of C.E | 2005 | ps2 |
| Kidou Senshi Z Gundam - Away to the Newtype | 1996 | snes |
| Kien | 2004 | gba |
| Kijin Kourinden Oni | 1994 | snes |
| Kikou Seiki Unitron - Sono Tsuide. Hikari Umareru Chi Yori | 2000 | ngpc |
| Kimi no Yuusha | 2008 | nds |
| Kin'iro no Corda 3 | 2010 | psp |
| Kin'iro no Corda 4 | 2016 | vita |
| King of Seas | 2021 | ps4, switch, xboxone |
| King's Bounty - The Conqueror's Quest | 1991 | genesis |
| King's Bounty II | 2021 | ps4, switch, xboxone |
| King's Field - Additional I | 2006 | psp |
| King's Field - Additional II | 2006 | psp |
| King's Field - The Ancient City | 2001 | ps2 |
| King's Field III - Pilot Style | 1996 | ps1 |
| King's Field IV | 2001 | ps2 |
| Kingdom Come: Deliverance | 2018 | ps4, switch, xboxone |
| Kingdom Hearts - 358-2 Days | 2009 | nds |
| Kingdom Hearts - 358-2 Days | 2004 | nds |
| Kingdom Hearts - Birth by Sleep | 2010 | psp |
| Kingdom Hearts - Birth by Sleep | 2010 | psp |
| Kingdom Hearts - Chain of Memories | 2004 | gba |
| Kingdom Hearts - HD 1.5 Remix | 2013 | ps3 |
| Kingdom Hearts - HD 2.5 Remix | 2014 | ps3, ps4 |
| Kingdom Hearts - Re-Chain of Memories | 2008 | ps2 |
| Kingdom Hearts 3D - Dream Drop Distance | 2012 | 3ds |
| Kingdom Hearts HD 2.8 Final Chapter Prologue | 2017 | ps4 |
| Kingdom Hearts II | 2005 | ps2 |
| Kingdom Hearts II - Final Mix | 2005 | ps2 |
| Kingdom Hearts III | 2019 | ps4, switch, xboxone |
| Kingdom Hearts: The Story So Far | 2018 | ps4 |
| Kingdom Under Fire - Circle of Doom | 2007 | xbox360 |
| Kingdom of Night | | ps4 |
| Kingdom of Night | 2022 | xboxone |
| Kingdom of Paradise | 2005 | psp |
| Kingdoms of Amalur - Reckoning | 2006 | ps3, xbox360 |
| Kingdoms of Amalur: Re-Reckoning | 2020 | ps4 |
| Kingdoms of Amalur: Re-Reckoning | 2021 | switch |
| Kinin Koumaroku Oni | 1990 | gb |
| Kinki no Magna | 2014 | 3ds |
| Kinnikuman II-Sei - Choujin Seisenshi | 2003 | wsc |
| Kisou Louga | 1993 | pcengine |
| Kisou Louga II - The Ends of Shangrila | 1995 | pcengine |
| Klonoa Heroes - Densetsu no Star Medal | 2002 | gba |
| Knight & Baby | 1998 | ps1 |
| Knight Quest | 1991 | gb |
| Knightin'+ | 2020 | ps4, xboxone |
| Knightin'+ | 2020 | vita |
| Knights of Pen & Paper +1 Deluxier Edition | 2018 | xboxone |
| Knights of Pen & Paper 2 Deluxiest Edition | 2018 | xboxone |
| Knights' Kingdom | 2004 | gba |
| Konchuu Fighters | 2002 | gbc |
| Konchuu Hakase 2 | 1999 | gbc |
| Konjiki no Gashbell!! - Makai no Bookmark | 2004 | gba |
| Koto Battle - Tengai no Moribito | 2001 | gbc |
| Koudai Baoshi - Hong | | nes |
| Koudai Baoshi - Jin | | nes |
| Koudai Baoshi - Lan | | nes |
| Koudai Baoshi - Yin | | nes |
| Koudai Guaishou - Zuanshi Ban | 2008 | nes |
| Koudai Guaishou II | 2006 | nes |
| Koudai Guaishou III | 2006 | nes |
| Koudai Shuijing | | nes |
| Koudelka | 1999 | ps1 |
| Koukiatsu Boy | 1998 | gb |
| Kouklotheatro - Yuukyuu no Hitomi | 2001 | ps1 |
| Kouryuu Densetsu Villgust - Kieta Shoujo | 1992 | snes |
| Kouryuu Densetsu Villgust Gaiden | 1993 | nes |
| Kousoku Card Battle - Card Hero | 2007 | nds |
| Kumitate Battle Kuttu Ketto | 1998 | ps1, saturn |
| Kurikin - Nano Island Story | 2007 | nds |
| Kuro no Ken - Blade of the Darkness | 1997 | ps1 |
| Kuusou Kagaku Sekai - Gulliver Boy | 1996 | snes |
| Kuusou Kagaku Sekai Gulliver Boy | 1995 | pcengine, saturn |
| Kyoukai Senjou no Horizon Portable | 2013 | psp |
| Kyouryuu Ikusei Battle RPG - Kyouryuu Monster | 2007 | nds |
| LBX - Little Battlers eXperience | 2015 | 3ds |
| La Legende de Thor | 1995 | genesis |
| La Pucelle | 2003 | ps2 |
| La Pucelle - Hikari no Seijo Densetsu | 2002 | ps2 |
| La Pucelle - Hikari no Seijo Densetsu - 2-shuume Hajimemashita | 2004 | ps2 |
| La Pucelle - Tactics | 2004 | ps2 |
| La Wares | 1995 | snes |
| Labyrinth Legend | 2021 | switch |
| Labyrinth Life | 2019 | ps4 |
| Labyrinth no Kanata | 2012 | 3ds |
| Labyrinth of Galleria: The Moon Society | 2020 | ps4 |