| Title | Games |
| Radical Entertainment Location Unknown | 4 |
| Rainbow Studios Location Unknown | 5 |
| Rare Twycross, Leicestershire, UK | 22 |
| Ratbag Games Adelaide, South Australia | 0 |
| Radon Labs Berlin Germany | 1 |
| Rage Software Liverpool UK | 0 |
| Raven Software Madison, Wisconsin, USA | 6 |
| Razorworks Oxfordshire, UK | 1 |
| Real Time Associates Location Unknown | 0 |
| Real Time Worlds Dundee, Scotland | 2 |
| Rebel Act Location Unknown | 0 |
| Rebellion UK | 4 |
| Red Storm Entertainment Morrisville, NC, USA | 2 |
| Reflections Interactive Location Unknown | 0 |
| Relic Vancouver, Canada | 3 |
| Remedy Entertainment Finland | 2 |
| Replay Studios Hamburg, Germany | 2 |
| responDESIGN Portland, OR | 0 |
| Revolution Software UK | 0 |
| Rockstar Games New York, USA | 4 |
| Rockstar North Edinburgh, Scotland | 6 |
| Rockstar San Diego San Diego, CA | 2 |
| Ronin Entertainment Novato, CA | 0 |
| Runecraft England, UK | 0 |
| Reflexive Entertainment Location Unknown | 1 |
| Red Tribe Location Unknown | 3 |
| Rockstar Vancouver Location Unknown | 2 |
| Revistonic Location Unknown | 1 |
| Reality Pump Location Unknown | 2 |
| Rubicon Development Location Unknown | 1 |
| Rocksteady Studios Location Unknown | 6 |
| Running Pixel Location Unknown | 2 |
| Radar Group Location Unknown | 0 |
| Recom Location Unknown | 1 |
| Reiser Games Location Unknown | 1 |
| ralph78fr Location Unknown | 2 |
| Reality Pump Location Unknown | 1 |
| Ruffian Games Location Unknown | 1 |
| RedLynx Location Unknown | 3 |
| Red Eagle Games Location Unknown | 0 |
| RTL Location Unknown | 1 |
| Robomodo Location Unknown | 5 |
| RodYan Location Unknown | 1 |
| rece Location Unknown | 1 |
| RyoShinji Location Unknown | 1 |
| Raccoon456 Location Unknown | 2 |
| RIC Location Unknown | 1 |
| reedake2 Location Unknown | 1 |
| Regolith Games Location Unknown | 1 |
| Running With Scissors Location Unknown | 1 |
| Runic Games Location Unknown | 1 |
| Reverge Labs Location Unknown | 1 |
| Relentless Software Location Unknown | 3 |
| Robot Entertainment Location Unknown | 1 |
| Rovio Location Unknown | 13 |
| Ronimo Games Location Unknown | 1 |
| Regista Location Unknown | 1 |
| Realta Entertainment Group Location Unknown | 1 |
| R3dDr4g0n Location Unknown | 1 |
| ReaperGamingStudios Location Unknown | 1 |
| Rising Star Games Location Unknown | 0 |
| RogueRocket Games Location Unknown | 3 |
| Reef Entertainment Location Unknown | 0 |
| Red Fly Studios Location Unknown | 1 |
| Revo Solutions Location Unknown | 1 |
| Respawn Entertainment Location Unknown | 1 |
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