| QOOCsoft | Developer | |
| QQnut Games | Developer | |
| QUByte Interactive | DeveloperPublisher | |
| QV Software | Publisher | |
| QWARKO | Developer | |
| QYOUK | Developer | |
| QZ Productions | Developer | |
| Qangeldratsch | Developer | |
| Qardem | Developer | |
| Qazhax | Developer | |
| QaziTV | Developer | |
| Qazikol | Developer | |
| QbStorm | Developer | |
| QdL | Developer | |
| QeorgeGames | Developer | |
| Qi Studios | Developer | |
| Qianrui (Leo) Li Digital Art | Developer | |
| QoP Dev Team | Developer | |
| Qoma | Developer | |
| Qplaze | Developer | |
| Qrostar | Developer | |
| Qt01 | Developer | |
| QuByte Interactive | DeveloperPublisher | |
| Quabbo | Developer | |
| QuadCorps | Developer | |
| Quade Zaban | Developer | |
| QuadraTron Games | Developer | |
| Quadratic Games | Developer | |
| Quadriga Games | Developer | |
| Quadro Delta | DeveloperPublisher | |
| Quaking Aspen | Developer | |
| Qualestory games | Developer | |
| Quality Software | DeveloperPublisher | |
| Quality Software (James Albanese) | Developer | |
| Quality Studios | Developer | |
| QualityGames | Developer | |
| Qualquer Rafa | Developer | |
| Quantam Studios | Developer | |
| Quantex | Developer | |
| Quantic Dream | DeveloperPublisher | |
| Quantum Astrophysicists Guild | DeveloperPublisher | |
| Quantum Axcess | DeveloperPublisher | |
| Quantum Cube Studios | Developer | |
| Quantum Entanglement Games | Developer | |
| Quantum Factory | Developer | |
| Quantum Productions | Developer | |
| Quantum Quality Productions | DeveloperPublisher | |
| Quantum Sheep | Developer | |
| Quantum Soup Studios | Developer | |
| QuantumRevenant | Developer | |