| 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 |