| 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 | |