| 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 | — |
| Q Entertainment | Japan | 2003 | 5 | — |
| Q-Games | Japan | August 9, 2001 | 12 | 7 |
| Q-X | — | — | 1 | 1 |
| Qene Games | Ethiopia | 2016 | 2 | — |
| QLOC | Poland | 2009 | 6 | — |
| QualiArts | Japan | 2016 | 2 | 1 |
| Quantic Dream | France | 1997 | — | 1 |
| Quantum Giant | United States | 2016 | 1 | — |
| Quazar Studio | Russia | 2003 | 1 | — |
| QubicGames | Poland | 2004 | — | 4 |
| QUByte Interactive | Brazil | — | 1 | 40 |
| Quest | Japan | 1988 | 7 | 2 |
| Question | United States | 2013 | 1 | — |
| Quicksilver Software | United States | 1984 | 3 | — |
| Quin Rose | — | 2005 | 1 | 2 |
| Quintet | Japan | April 1989 | 4 | — |
| Quite Interesting Limited | United Kingdom | 1999 | 1 | — |
| Qureate | Japan | October 25, 2021 | 5 | 6 |
| R-Next | Colombia | — | 1 | — |
| R74n | United States | May 2, 2017 | 2 | 1 |
| Rabén & Sjögren | Sweden | 1942 | — | 1 |
| RAC7 Games | Canada | 2014 | 1 | 1 |
| Racjin | Japan | April 17, 1995 | 12 | — |
| Radarsoft | Netherlands | 1984 | 20 | 6 |
| Radiangames | United States | March 2010 | 1 | — |
| Radical Entertainment | Canada | September 1991 | 18 | — |
| Radical Forge | United Kingdom | October 13, 2016 | 1 | — |
| RageSquid | Netherlands | 2011 | 2 | — |
| Rain Entertainment | Japan | February 2004 | 1 | 1 |
| Rain Games | Norway | 2010 | 4 | 2 |
| Rainbird Software | — | 1986 | 1 | 1 |
| Rainbow Arts | Germany | 1984 | 3 | 2 |
| Rainbow Studios | United States | 1996 | 9 | — |
| Rainy Frog | Japan | — | — | 5 |
| Raiser Games | Spain | — | — | 3 |
| Rake in Grass | Czech Republic | 2000 | 4 | 2 |
| RandomSpin Games | Moldova | — | — | 2 |
| Rapid Snail | Ukraine | 2015 | 1 | — |
| Rare Ltd. | United Kingdom | 1985 | 45 | 3 |
| Rarebyte | Austria | 2006 | 1 | — |
| Rat Cliff Games | Spain | — | 1 | — |
| Rat Tower | Austria | 2021 | 1 | — |
| Ratalaika Games | Spain | May 14, 2013 | 15 | 83 |
| Raven Software | United States | 1990 | 19 | — |
| Ravensburger Interactive Media | Germany | February 27, 1992 | — | 1 |
| Ravenscourt | Austria | — | — | 16 |
| Ravn Studio | Norway | April 10, 2002 | 1 | — |
| Raw Fury | Sweden | 2015 | — | 26 |
| Raw Thrills | United States | 2001 | 3 | 2 |
| Rayark Inc. | Taiwan | September 2011 | 1 | — |
| Raylight Games | Italy | 2000 | 1 | — |
| Razorback Developments | United Kingdom | 2003 | 1 | — |
| Razorworks | United Kingdom | 1996 | 1 | — |
| Razzart Visual | United States | 2002 | 1 | 1 |
| RDI Video Systems | United States | 1982 | 1 | — |
| Re-Logic | United States | 2011 | 2 | 1 |
| Ready at Dawn | United States | 2003 | 3 | — |
| Reakktor Media | Germany | 1991 | — | — |
| Reality Labs | United States | 2020 | — | 2 |
| Reality Pump Studios | Poland | 2003 | 4 | — |
| Realmforge Studios | Germany | 2008 | 3 | — |
| Realtime Associates | United States | 1986 | 9 | — |
| Realtime Worlds | United Kingdom | 2002 | 1 | — |
| Rebellion Developments | United Kingdom | 1992 | 26 | 10 |
| Recloak | Poland | — | 2 | 2 |
| Reco Technology | Spain | — | 2 | 2 |
| Recreate Games | South Korea | — | 1 | — |
| Red Art Games | France | December 18, 2017 | — | 9 |
| Red Barrels | — | 2011 | 5 | 5 |
| Red Beard Games | United Kingdom | — | 1 | — |
| Red Candle Games | Taiwan | September 2015 | 1 | 1 |
| Red Dot Games | Poland | — | 4 | — |
| Red Ego Games | United Kingdom | January 20, 2020 | 2 | 1 |
| Red Entertainment | Japan | 1976 | 21 | 1 |
| Red Games Co. | United States | 2018 | 4 | 1 |
| Red Hook Studios | Canada | 2013 | 2 | 2 |
| Red Limb Studio | Poland | 2016 | 2 | 2 |
| Red Martyr Entertainment | Croatia | 2019 | 3 | 2 |
| Red Orb Entertainment | United States | 1997 | 1 | 4 |
| Red Phantom Games | United Kingdom | — | 1 | — |
| Red Storm Entertainment | United States | 1996 | 11 | 4 |
| Red Thread Games | Norway | September 5, 2012 | 1 | — |
| Redblack Spade | Russia | — | 1 | — |
| RedDeerGames | Poland | — | 1 | 23 |