| ProdigalSon Games | Developer | |
| Produce | Developer | |
| Produce! | DeveloperPublisher | |
| Produced Moon | Developer | |
| Production Exabilities | Developer | |
| Production I.G. | Developer | |
| Productions Associees | Publisher | |
| Productive Playtime (A. Raita, D.R. Tomppe, I. Summala) | Developer | |
| Proeco | Developer | |
| Proein S.L. | Publisher | |
| Proein Soft Line | DeveloperPublisher | |
| Prof Marrelli | Developer | |
| ProfKeegz | Developer | |
| ProfPille | Developer | |
| Professional Villains | Developer | |
| Professor Antonio | Developer | |
| Professor Hisao Ishigaki | Developer | |
| Professor Locaten | Developer | |
| ProfessorMunchies | Developer | |
| ProfessorStitch | Developer | |
| ProfessorZero | Developer | |
| Profi06 | Developer | |
| Profire | Developer | |
| Program-Ace | Developer | |
| ProgramGamer | Developer | |
| Programancer | Developer | |
| Programação em Jogos Digitais | Developer | |
| Programe | Publisher | |
| Programma International | Publisher | |
| Programmer Cheema | Developer | |
| Programmers-3 | DeveloperPublisher | |
| ProgrammingDimension | Developer | |
| Prograph | Developer | |
| Progress | Developer | |
| Progress Software | DeveloperPublisher | |
| Progressive Products | DeveloperPublisher | |
| ProgressiveInsurance | Developer | |
| Project | Developer | |
| Project 37 Games | Developer | |
| Project Aces | Developer | |
| Project BC | Developer | |
| Project Emit | Developer | |
| Project Guillotine | Developer | |
| Project Just | Developer | |
| Project Sora | Developer | |
| Project Soul | Developer | |
| Project Springbok at CCA | Developer | |
| Project Three Interactive | Publisher | |
| Project Two Interactive | DeveloperPublisher | |
| Project Two Interactive BV | Publisher | |