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| JLKings | Developer | |
| JLMKart | Developer | |
| JLPM | Developer | |
| JLateralus | Developer | |
| JMAS | Developer | |
| JMD Arts | Developer | |
| JME Engineering | DeveloperPublisher | |
| JMIDEV | Developer | |
| JMJ Interactive | DeveloperPublisher | |
| JMRSN | Developer | |
| JMS | Developer | |
| JMS777 | Developer | |
| JMStark | Developer | |
| JManoclay | Developer | |
| JN Production | Developer | |
| JN Squared | Developer | |
| JNH | Developer | |
| JNI | Developer | |
| JNS Software | Publisher | |
| JO-əl | Developer | |
| JOAOMOTAGAMES | Developer | |
| JOEY | Developer | |
| JOLLY JUMPER STUDIOS | Developer | |
| JON MECH | Developer | |
| JORDI_B.2018 | Developer | |
| JORGE BIEDMA AZUAR | Publisher | |
| JOSEPH QUESTED | Developer | |
| JOSHUA ROBERTSON | Developer | |
| JOUST | Developer | |
| JOY | Developer | |
| JOrbits | Developer | |
| JP | Developer | |
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| JP Enix Corporation | Publisher | |
| JP LeBreton | Developer | |
| JP Sony Music Entertainment | Publisher | |
| JP Success | Publisher | |
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| JP Takara | Publisher | |
| JP Technos Japan | Publisher | |
| JP: 3goo | Publisher | |
| JP: 5pb. | Publisher | |
| JP: AQ Interactive | Publisher | |
| JP: ASNetworks | Publisher | |
| JP: Acquire | Publisher | |
| JP: Activision | Publisher | |
| JP: Agatsuma Entertainment | Publisher | |
| JP: Alfa System | Publisher | |
| JP: Arc System Works | Publisher | |