| Kodansha | DeveloperPublisher | |
| Kodansha Research Institute | Developer | |
| Kodeleo | Developer | |
| Koder | Developer | |
| Kodiak Interactive | Developer | |
| Kodiqi | Developer | |
| Kodobur | Developer | |
| Kodobur Yazilim | DeveloperPublisher | |
| Kodomos'Arts | Developer | |
| Kodots games | Developer | |
| Kodraan | Developer | |
| Kodub | Developer | |
| Koei | DeveloperPublisher | |
| Koei Canada | Developer | |
| Koei Tecmo | DeveloperPublisher | |
| Koei Tecmo Games | DeveloperPublisher | |
| KoeiEU | Publisher | |
| KoeiJP | Publisher | |
| KoeiJP,NA | Publisher | |
| KoeiJP/NA | Publisher | |
| KoeiPAL | Publisher | |
| Koffy | Developer | |
| Koga Game Factory | Developer | |
| Kogado Software | DeveloperPublisher | |
| Kogado Software Products | DeveloperPublisher | |
| Kogado Studio | DeveloperPublisher | |
| Koi | Developer | |
| Koi Legend | Developer | |
| Koicrow | Developer | |
| Koimarina Games | Developer | |
| Kojima Productions | Developer | |
| Koki Studios | Developer | |
| Koko13.2 | Developer | |
| Kokopel | Developer | |
| Kokopeli | DeveloperPublisher | |
| Kokopeli Digital Studios | Publisher | |
| KolFun | Developer | |
| Kolja Hubatsch | Developer | |
| Kolphis | Developer | |
| KoltonKennedy | Developer | |
| Kolupsy | Developer | |
| Komax | Publisher | |
| Komes | Developer | |
| Komeya | DeveloperPublisher | |
| Komitsu | Developer | |
| Komodroid New Zealand | Developer | |
| Kompakt | Developer | |
| Kompart UK | Publisher | |
| Kompot Studios | Developer | |
| Komrade_Konrad | Developer | |
| Komster | Developer | |
| Konam | Publisher | |
| Konami | DeveloperPublisher | |
| Konami (JP) | Publisher | |
| Konami (NA) | Publisher | |
| Konami (NA/EU) | Publisher | |
| Konami / | Publisher | |
| Konami Computer Entertainment Hawaii | Developer | |
| Konami Computer Entertainment Japan | DeveloperPublisher | |
| Konami Computer Entertainment Kobe | Developer | |
| Konami Computer Entertainment Nagoya | DeveloperPublisher | |
| Konami Computer Entertainment Osaka | Developer | |
| Konami Computer Entertainment Sapporo | Developer | |
| Konami Computer Entertainment Studios | Developer | |
| Konami Computer Entertainment Tokyo | Developer | |
| Konami Computer Games Aoyama | Developer | |
| Konami Digital Entertainment | DeveloperPublisher | |
| Konami EU | Publisher | |
| Konami Examu Entertainment inc. | Developer | |
| Konami HWI | Developer | |
| Konami Honolulu Studio | Developer | |
| Konami JP | Publisher | |
| Konami JP/EU | Publisher | |
| Konami NA/EU> | Publisher | |
| Konami Software Shanghai | Developer | |
| Konami TYO | Developer | |
| Konami of America | DeveloperPublisher | |
| KonamiEU | Publisher | |
| KonamiJP | Publisher | |
| KonamiJP,KO | Publisher | |
| KonamiNA | Publisher | |
| KonamiPAL | DeveloperPublisher | |
| KonanDenki | Publisher | |
| Konata_chan | Developer | |
| Kondra | Developer | |
| Koneko | Developer | |
| KonerLoner | Developer | |
| Kong Orange | Developer | |
| Kongregate | Publisher | |
| Konig Games | Developer | |
| Konillon Game Studio | Developer | |
| Konjak | Developer | |
| Konrad Gadzina | Developer | |
| Konrad Mampe | Developer | |
| Konradventure | Developer | |
| Konstandin Igor Ruiz | Developer | |
| Konstantin Khitrykh | Developer | |
| Konstantin Kitmanov | Developer | |
| Konstantinos D. | Developer | |
| Konstantinosmy | Developer | |