The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Reality Pump (Developer) (2 members)
- Realta Entertainment Group (Developer) (1 member)
- Rebellion Developments (Developer) (7 members)
- Recoil Games (Developer) (1 member)
- Recom (Developer) (1 member)
- Recom (Publisher) (2 members)
- Record of Agarest (Series) (3 members)
- Red Dead (Series) (2 members)
- Red Entertainment (Developer) (2 members)
- Red Faction (Series) (3 members)
- Red Fly Studio (Developer) (1 member)
- Red Hare Studios (Developer) (1 member)
- Red Hare Studios (Publisher) (1 member)
- Red Johnson's Chronicles (Series) (2 members)
- Red Storm Entertainment (Developer) (1 member)
- Redoubt (Developer) (1 member)
- Reef Entertainment (Publisher) (2 members)
- Reflexive Entertainment (Developer) (1 member)
- Reflexive Entertainment (Publisher) (1 member)
- Regionless release date parameter (Infobox) (138 members)
- Regista (Developer) (2 members)
- Release format (3 members)
- Release region (4 members)
- Release type (4 members)
- Relentless Software (Developer) (6 members)
- Relentless Software (Publisher) (1 member)
- Relic Entertainment (Developer) (1 member)
- Renderer: OpenGL (Config) (3 members)
- Renderer: Vulkan (Config) (0 members)
- Renegade Kid (Developer) (1 member)
- Renegade Kid (Publisher) (1 member)
- Resident Evil (Series) (11 members)
- Resistance (Series) (3 members)
- Resolution scale (Config) (18 members)
- Resolution scale threshold (Config) (38 members)
- Reverb Publishing (Publisher) (2 members)
- Reverb Triple XP (Publisher) (1 member)
- Reverge Labs (Developer) (1 member)
- Rhino Studios (Developer) (1 member)
- Rhythm (Genre) (104 members)
- Ridge Racer (Series) (2 members)
- Right Square Bracket Left Square Bracket (Developer) (1 member)
- Right Square Bracket Left Square Bracket (Publisher) (1 member)
- Ripstone (Developer) (1 member)
- Ripstone (Publisher) (4 members)
- Risen (Series) (2 members)
- Rising Star Games (Publisher) (5 members)
- Risk (Series) (2 members)
- Robomodo (Developer) (4 members)
- Rock Band (Series) (12 members)
- Rockin' Android (Publisher) (1 member)
- Rocksmith (Series) (2 members)
- Rockstar Games (Developer) (8 members)
- Rockstar Games (Publisher) (9 members)
- Rocksteady Studios (Developer) (2 members)
- Roguelike (Genre) (1 member)
- Role-playing (Genre) (93 members)
- Roll7 (Developer) (1 member)
- Roll7 (Publisher) (1 member)
- Rombax Games (Publisher) (3 members)
- Ronimo Games (Developer) (2 members)
- Ronimo Games (Publisher) (1 member)
- Route 1 Games (Developer) (1 member)
- Rovio Entertainment (Developer) (2 members)
- Rugby Challenge (Series) (3 members)
- Rugby League (Series) (2 members)
- Ryu Ga Gotoku Studio (Developer) (8 members)
- SCE Japan Studio (Developer) (1 member)
- SCE San Diego Studio (Developer) (1 member)
- SCE Santa Monica Studio (Developer) (7 members)
- SCE Studio Liverpool (Developer) (2 members)
- SNK (Developer) (2 members)
- SNK Playmore (Developer) (13 members)
- SNK Playmore (Publisher) (18 members)
- SOCOM (Series) (2 members)
- SPU block size: Mega (Config) (26 members)
- SPU block size: Safe (Config) (3 members)
- SPU decoder: Interpreter (static) (Config) (2 members)
- SPU decoder: Recompiler (ASMJIT) (Config) (7 members)
- SPU decoder: Recompiler (LLVM) (Config) (0 members)
- SPU xfloat accuracy: Accurate (Config) (5 members)
- SPU xfloat accuracy: Approximate (Config) (4 members)
- SPU xfloat accuracy: Relaxed (Config) (8 members)
- SYNC (Developer) (1 member)
- Saber Interactive (Developer) (3 members)
- Sacred (Series) (3 members)
- Saint Seiya (Series) (3 members)
- Saints Row (Series) (4 members)
- Sam & Max (Series) (2 members)
- Sammy Corporation (Developer) (1 member)
- Samurai Warriors (Series) (7 members)
- San Diego Studio (Developer) (18 members)
- Sand Grain Studios (Developer) (3 members)
- Sandblast Games (Developer) (1 member)
- Sandbox (Genre) (7 members)
- Sandlot (Developer) (1 member)
- Sangoku Hime (Series) (1 member)
- Sangokushi (Series) (2 members)
- Sanuk Games (Publisher) (1 member)
- Sanzaru Games (Developer) (3 members)
- Sarbakan (Developer) (1 member)
- Saurus (Developer) (1 member)
- Saw (Series) (2 members)
- Scene It? (Series) (2 members)
- Schlag den Raab (Series) (2 members)
- Science Adventure (Series) (8 members)
- Scientifically Proven (Developer) (1 member)
- Scientifically Proven (Publisher) (1 member)
- Seaven Studio (Developer) (1 member)
- Seaven Studio (Publisher) (1 member)
- Secret Level (Developer) (3 members)
- Section 8 (Series) (2 members)
- Seed Studios (Developer) (1 member)
- Sega (Developer) (25 members)
- Sega (Publisher) (108 members)
- Sega AM2 (Developer) (1 member)
- Sega AM3 (Developer) (2 members)
- Sega Racing Studio (Developer) (1 member)
- Sega Rally (Series) (1 member)
- Sega Studios Australia (Developer) (1 member)
- Sega Technical Institute (Developer) (1 member)
- Semanoor International (Publisher) (1 member)
- Semaphore (Developer) (1 member)
- Sengoku Basara (Series) (4 members)
- Sengoku Hime (Series) (4 members)
- Series (265 members)
- Serious Parody (Developer) (1 member)
- Serious Parody (Publisher) (1 member)
- Seven45 Studios (Developer) (1 member)
- Seven45 Studios (Publisher) (1 member)
- SevenOne Intermedia (Developer) (1 member)
- SevenOne Intermedia (Publisher) (1 member)
- Shaba Games (Developer) (1 member)
- Shader mode: Async with Shader Interpreter (Config) (2 members)
- Shader mode: Legacy (singlethreaded) (Config) (6 members)
- Shader mode: Shader Interpreter only (Config) (1 member)
- Shader quality: High (Config) (4 members)
- Shader quality: Low (Config) (1 member)
- Shank (Series) (2 members)
- Shin Hayarigami (Series) (2 members)
- Shindenken (Developer) (1 member)
- Shining (Series) (1 member)
- Shiny Entertainment (Developer) (1 member)
- Shoot 'em up (Genre) (41 members)
- Shooter (Genre) (41 members)
- Side-scroller (Genre) (3 members)
- SideQuest Studios (Developer) (4 members)
- Sideline Amusements (Developer) (1 member)
- Sidhe (Developer) (5 members)
- Sidhe (Publisher) (1 member)
- Sidhe Interactive (Developer) (1 member)
- Sierra Entertainment (Publisher) (1 member)
- Sigma Team (Developer) (1 member)
- Silence all logs: On (Config) (5 members)
- Silent Hill (Series) (3 members)
- Silicon Knights (Developer) (1 member)
- Silicon Studio (Developer) (2 members)
- SilverStar (Developer) (2 members)
- SilverStar (Publisher) (3 members)
- Silverball Studios (Developer) (1 member)
- Simulation (Genre) (16 members)
- SingStar (Series) (28 members)
- Single-player (Game mode) (1,471 members)
- Size Five Games (Developer) (1 member)
- Skate (Series) (3 members)
- SkyFallen Entertainment (Developer) (1 member)
- Skylanders (Series) (6 members)
- Slang (Publisher) (1 member)
- Slant Six Games (Developer) (3 members)
- Sledgehammer Games (Developer) (2 members)
- Sleep timers accuracy: As Host (Config) (19 members)
- Sleep timers accuracy: Usleep Only (Config) (1 member)
- Slightly Mad Studios (Developer) (3 members)
- Slitherine (Developer) (1 member)
- Slitherine (Publisher) (1 member)
- Sly Cooper (Series) (3 members)
- SmackDown vs. Raw (Series) (8 members)
- Smartphone Labs LLC (Publisher) (1 member)
- Sniper: Ghost Warrior (Series) (2 members)
- Sniper Elite (Series) (2 members)
- Snowblind Studios (Developer) (1 member)
- Snowboarding (Genre) (2 members)
- Social simulation (Genre) (2 members)
- Soedesco (Publisher) (1 member)
- Soldner-X (Series) (2 members)
- Sonic Team (Developer) (8 members)
- Sonic Team USA (Developer) (1 member)
- Sonic the Hedgehog (Series) (12 members)
- Sony Computer Entertainment (Publisher) (249 members)
- Sony Online Entertainment (Developer) (4 members)
- Sony Online Entertainment (Publisher) (24 members)
- SoulCalibur (Series) (4 members)
- Souls (Series) (3 members)
- SouthPeak Games (Publisher) (3 members)
- South Park (Series) (1 member)
- Southend Interactive (Developer) (3 members)
- Space Monkey International (Developer) (1 member)
- Spark Unlimited (Developer) (4 members)
- Sparkworkz (Developer) (1 member)
- Sparpweed (Publisher) (1 member)
- Spearhead Games (Developer) (1 member)
- Spelunker (Series) (2 members)
- Spicy Horse (Developer) (1 member)
- Spider-Man (Series) (6 members)
- Spiders (Developer) (4 members)
- Spike (Developer) (4 members)
- Spike Chunsoft (Developer) (3 members)
- Spike Chunsoft (Publisher) (6 members)
- SpinVector (Developer) (1 member)
- SpinVector (Publisher) (1 member)
- Splash Damage (Developer) (1 member)
- Sports (Genre) (266 members)
- Sports Champions (Series) (2 members)
- Sproing Interactive Media (Developer) (2 members)
- Sprout Games (Developer) (1 member)
- Square Enix (Developer) (9 members)
- Square Enix (Publisher) (40 members)
- Stainless Games (Developer) (5 members)
- Stainless Studios (Developer) (1 member)
- Star Ocean (Series) (3 members)
- Starbreeze Studios (Developer) (5 members)
- Start the Party! (Series) (2 members)
- Stealth (Genre) (32 members)
- Stealth Inc. (Series) (2 members)
- Stickmen Studios (Developer) (1 member)
- Stickmen Studios (Publisher) (1 member)
- Sting Entertainment (Developer) (2 members)
- StormBASIC (Developer) (1 member)
- StormBASIC (Publisher) (1 member)
- Straight Right (Developer) (1 member)
- Straight Right (Publisher) (1 member)
- Strange Loop Games (Developer) (1 member)
- Strategy (Genre) (60 members)
- Strawdog Studios (Developer) (1 member)
- Street Fighter (Series) (5 members)
- Strict rendering mode: On (Config) (13 members)
- Studio Saizensen (Developer) (1 member)
- Sucker Punch Productions (Developer) (4 members)
- Sullivan Bluth Interactive (Developer) (1 member)
- Sumo Digital (Developer) (12 members)
- Sunsoft (Publisher) (1 member)
- SuperBot Entertainment (Developer) (1 member)
- SuperVillain Studios (Developer) (2 members)
- Super Robot Wars (Series) (7 members)
- Super X Studios (Developer) (1 member)
- Superbike World Championship (Series) (3 members)
- Superflat Games (Developer) (1 member)
- Supermassive Games (Developer) (8 members)
- Supersonic Software (Developer) (1 member)
- Survival (Genre) (4 members)