| P2 Entertainment | United Kingdom | December 23, 2004 | 1 | 1 |
| Pack-In-Video | Japan | August 3, 1970 | 3 | 6 |
| Page 44 Studios | United States | 1998 | 1 | — |
| Paintbucket Games | Germany | — | 3 | — |
| Paks | Hungary | — | 1 | — |
| Palace Software | United Kingdom | 1984 | 4 | 1 |
| Paladin Studios | Netherlands | July 2005 | 2 | — |
| Palette | Japan | 2002 | 1 | — |
| Palm Pioneer | People's Republic of China | May 2014 | 1 | — |
| PAM Development | France | 1997 | 2 | — |
| Pan Vision | Sweden | 2001 | 3 | 19 |
| Panasonic Corporation | Japan | 1918 | — | 1 |
| Pandemic Studios | United States | 1998 | 7 | — |
| Pandora Box | Japan | 1989 | 1 | — |
| Pangea Software | United States | 1987 | 3 | 2 |
| Panic | United States | — | — | 5 |
| Panic Barn | United Kingdom | August 2012 | 3 | — |
| Panic Button | United States | 2007 | 2 | — |
| Panther Games | — | 1985 | 2 | — |
| Panther Software | Japan | 1987 | — | 1 |
| Paon DP | Japan | January 20, 1999 | 6 | — |
| Papaya Studio | United States | 1999 | 4 | — |
| Parabole | Canada | 2012 | 1 | — |
| Paradigm Entertainment | United States | March 1997 | 6 | — |
| Paradox Interactive | Sweden | 1999 | 7 | 54 |
| Paradox Tinto | Spain | 2020 | 1 | — |
| Paragon Software | United States | 1987 | — | 1 |
| Parallel Studio | France | October 2015 | 1 | — |
| Paramount Pictures | United States | May 8, 1912 | — | 1 |
| Paranoid Interactive | Poland | — | 1 | — |
| Park Place Productions | United States | 1989 | 3 | — |
| Parker Brothers | United States | 1883 | 1 | 5 |
| PassTech Games | France | October 11, 2012 | 2 | — |
| Pastagames | France | 2001 | 1 | — |
| Pathea Games | People's Republic of China | 2010 | 6 | 1 |
| Pavonis Interactive | United States | 2015 | 1 | 1 |
| Pax Softnica | Japan | May 14, 1987 | 3 | — |
| PBI Software | United States | — | — | 1 |
| Peach Princess | United States | — | — | 10 |
| Pearl GmbH | Germany | September 6, 1989 | — | 1 |
| Pearson Education | Italy | 1998 | 1 | — |
| Pencil | Japan | — | — | 4 |
| Pendulo Studios, S.L. | Spain | 1994 | 4 | — |
| Penguin Pop Games | United States | January 18, 2021 | — | 6 |
| Penguin Software | United States | 1980 | — | 2 |
| PennFilm Studio AB | Sweden | 1967 | 1 | — |
| Pentavision | — | February 3, 2004 | — | 1 |
| People Can Fly | Poland | 2002 | 1 | — |
| Perfect Entertainment | United Kingdom | 1991 | 3 | — |
| Perfectly Paranormal | Norway | August 12, 2015 | 1 | — |
| Persha Studia | Ukraine | 2000 | 1 | — |
| Person of Interests | United Kingdom | January 15, 2021 | 1 | 1 |
| Personal Software Services | United Kingdom | 1981 | — | 2 |
| Perun Creative | Czech Republic | — | 1 | 1 |
| Petit Depotto | Japan | — | 1 | 1 |
| Petit Fabrik | Brazil | 2012 | 2 | — |
| Petite Games | Mexico | — | 7 | 1 |
| Petoons Studio | Spain | 2016 | 5 | 1 |
| Petroglyph Games | United States | April 2003 | 7 | 3 |
| PF Magic | United States | 1991 | 2 | — |
| Phantagram | South Korea | 1994 | 1 | — |
| Phenomedia | Germany | 1999 | 2 | 4 |
| Phigames | United Kingdom | — | 1 | — |
| Philips Interactive Media, Inc. | Netherlands | 1990 | — | 5 |
| PHL Collective | United States | — | 5 | — |
| Phoenix Games Ltd. | Netherlands | May 2002 | 1 | 2 |
| Phoenix Labs | Canada | April 2014 | 1 | 1 |
| Phoenix Studio | France | April 16, 2004 | 1 | — |
| Phoenixx | Japan | — | — | 8 |
| Pi Studios | United States | 2002 | 2 | — |
| Piccolo Studio | Spain | — | 1 | — |
| Picorinne Soft | Japan | — | 2 | — |
| PID Games | France | — | — | 21 |
| PID Publishing | France | 2020 | — | 1 |
| Piece of Cake studios | France | October 26, 2015 | 2 | 1 |
| Piko Interactive | — | 2013 | 6 | — |
| Pikpok | New Zealand | May 1997 | 4 | 2 |
| Pine Studio | Croatia | 2012 | 3 | 3 |
| Pionesoft | Japan | — | — | 1 |
| Pipe studio | Russia | 2002 | 2 | — |
| Pipeworks Software | United States | 1999 | 5 | 1 |
| Pipistrello | Sweden | April 7, 2003 | 1 | — |
| Pippin Games | Brazil | — | 2 | 1 |
| Piranha Bytes | Germany | October 12, 1997 | 8 | — |
| Piranha Games | Canada | 1999 | 3 | 1 |
| Piu-Piu Team | Lithuania | October 16, 2014 | — | 2 |
| Pixadome | Sweden | — | 2 | — |
| PiXEL | Japan | — | 1 | 1 |
| Pixel Beef Games | Germany | 2020 | 1 | 1 |
| Pixel Reef | — | 2016 | 1 | — |
| Pixel Soft | People's Republic of China | March 18, 2002 | 4 | — |
| Pixel Toys | United Kingdom | September 25, 2012 | 1 | 1 |
| Pixelated Milk | Poland | — | 2 | 1 |
| Pixelbite | Sweden | — | 5 | — |
| PixelHeart | France | December 4, 2018 | — | 1 |
| PixelJAM Games | United States | 2005 | 3 | 6 |
| Pixonic | Cyprus | 2009 | 2 | — |
| Pixpil | People's Republic of China | — | 1 | — |
| Plaion | Austria | 1994 | — | 12 |
| Planet Moon Studios | United States | 1997 | 2 | — |
| Planeta DeAgostini | Spain | 1982 | — | 1 |
| Plarium | — | 2009 | 5 | 4 |
| Platine Dispositif | Japan | — | 1 | — |
| Play Mechanix | — | 1995 | 2 | — |
| Play Ten Interactive | Russia | 2005 | — | 2 |
| Play-It | Poland | 1999 | — | 1 |
| Playbae | India | 2018 | 1 | — |
| Playdek | United States | 2009 | 1 | — |
| Playdots | United States | — | 1 | — |
| PlayFirst | United States | 2004 | 2 | 6 |
| Playfish | United Kingdom | 2007 | 1 | — |
| Playful Studios | United States | 2012 | 1 | 1 |
| Playground Games | United Kingdom | 2009 | 5 | — |
| Playground Productions | United States | 2022 | — | 4 |
| Playism | Japan | May 2011 | — | 70 |
| Playlogic Entertainment | Netherlands | 2002 | — | 4 |
| Playmeow Games | Taiwan | March 9, 2021 | — | 1 |
| Playrix | Ireland | 2004 | 1 | 1 |
| PlaySide Studios | Australia | — | 2 | — |
| Playsport Games | United Kingdom | 2015 | 2 | — |
| Playstack | United Kingdom | May 7, 2016 | — | 8 |
| PlayStation Mobile, Inc. | United States | — | 1 | 2 |
| PlayStation Studios | — | September 14, 2005 | 1 | — |
| Playtika | Israel | 2010 | 1 | 1 |
| PlayWay | Poland | 2011 | 1 | 28 |
| PM Studios | United States | 2008 | — | 7 |
| Pocketpair | Japan | April 2015 | 2 | 1 |
| Pocketwatch Games | United States | — | 1 | — |
| Point Blank Games | Germany | — | 1 | — |
| Point of View | — | 2000 | 1 | — |
| Point of View, Inc. | United States | 1996 | 2 | — |
| Pokelabo | Japan | November 2007 | 2 | 1 |
| Polarbit AB | Sweden | — | 3 | 1 |
| Pollux Gamelabs | — | 2004 | 1 | — |
| PolyCrunch Games | Malta | — | 1 | — |
| Polygon Art | Germany | — | 6 | 7 |
| Polygon Magic | Japan | April 3, 1996 | 3 | — |
| Polygon Treehouse | United Kingdom | May 2017 | 1 | — |
| Polyphony Digital | Japan | April 2, 1998 | 12 | — |
| Polyslash | Poland | 2015 | 2 | 1 |
| Pony Canyon | Japan | October 1966 | 2 | 20 |
| Poor Cat | Russia | — | 2 | 2 |
| Pop Software | United States | 1986 | 1 | — |
| Popcorn Arcade | United Kingdom | — | — | 3 |
| PopTop Software | United States | 1993 | 3 | — |
| Popy | Japan | 1971 | — | 1 |
| Porcelain Fortress | Iceland | 2016 | 1 | 1 |
| PortaPlay | Denmark | — | 1 | — |
| Portkey Games | — | 2017 | — | 1 |
| Positech Games | United Kingdom | 1997 | 5 | 5 |
| Powerhead Games | United States | 2000 | 5 | — |
| Powerhoof | Australia | March 2013 | 1 | 1 |
| PowerZ | France | July 15, 2020 | 1 | — |
| PQube | United Kingdom | — | — | 34 |
| Press Play | Denmark | 2006 | 1 | — |
| Presto Studios | United States | 1991 | 1 | — |
| Pretty Fly Games | Sweden | 2013 | 1 | 1 |
| Prideful Sloth | Australia | May 2015 | 1 | — |
| Prime Bit Games | Poland | 2017 | 3 | 3 |
| Prime Matter | Germany | — | — | 4 |
| Primula | Japan | — | 6 | 5 |
| PrincessSoft | Japan | 2001 | 1 | 3 |
| Prison Games | Poland | — | — | 2 |
| Private Division | United States | December 14, 2017 | — | 3 |
| Privateer Press | United States | 2000 | — | 1 |
| Pro Familia | Germany | December 23, 1952 | — | 2 |
| Produce! | Japan | April 6, 1990 | 1 | — |
| Production I.G | Japan | December 15, 1987 | 1 | — |
| Produktivkeller Studios | Germany | — | 1 | — |
| Project Siren | Japan | 2004 | 4 | — |
| Project Sora | Japan | 2009 | 1 | — |
| Project Soul | Japan | — | 5 | — |
| Project Two Interactive BV | Netherlands | — | 1 | 2 |
| ProjectMoon | South Korea | November 18, 2016 | 1 | 1 |
| Propaganda Games | Canada | 2005 | 3 | — |
| Prope | Japan | 2006 | 4 | — |
| Proper Games | United Kingdom | 2006 | 1 | — |
| Prototype | Japan | March 27, 2006 | — | 7 |
| Província Studio | Brazil | 2013 | 1 | — |
| PROXIMA - software nové dimenze | Czech Republic | June 20, 1990 | — | 4 |
| Pseudo Interactive | Canada | 1995 | 3 | — |
| Psikyo | Japan | July 17, 1992 | 8 | 4 |
| Psygnosis | United Kingdom | 1984 | 1 | 2 |
| Psyonix | United States | 2000 | 2 | 1 |
| Pterodon | Czech Republic | 1998 | 2 | — |
| PUBG Studios | South Korea | — | 1 | — |
| Pujia8 Studio | People's Republic of China | December 3, 2015 | — | 2 |
| Pulltop | Japan | 2002 | 4 | 3 |
| Pulsatrix Studios | Brazil | — | 1 | — |
| Puppy Games | United Kingdom | — | — | 1 |
| Purple Lamp | Austria | — | 2 | — |
| Purple Pwny Studios | United States | — | 1 | — |
| Purple software | Japan | 1998 | 13 | 10 |
| Purple Tree | Argentina | — | 4 | 3 |
| Pygmy Studio | Japan | November 13, 2007 | 1 | 1 |
| Pyro Studios | Spain | 1996 | 5 | — |