| MAME Name | Description | Official | Alternate | VC WS | ||
 | r2dtank | R2D Tank | - | - | 3.26 MB 06-Aug-2022 Download | |
 | r2dx_v33 | Raiden II New / Raiden DX (newer V33 PCB) (Raiden DX EEPROM) | - | - | 589 kB 19-May-2023 Download | |
| rabbit | Rabbit (Asia 3/6) | - | - | 219 kB 06-Aug-2022 Download | |
 | rabiolep | Rabio Lepus (Japan) | - | - | 4.69 MB 06-Aug-2022 Download | |
| raccoon | Raccoon World | - | - | 245 kB 06-Aug-2022 Download | |
 | rachero | Racing Hero (FD1094 317-0144) | 175 kB 06-Aug-2022 Download | - | 2.66 MB 06-Aug-2022 Download | |
| racingb | Racing Beat (World) | - | - | 217 kB 06-Aug-2022 Download | |
 | radarscp | Radar Scope (TRS02, rev. D) | 958 kB 06-Aug-2022 Download | - | 2.53 MB 06-Aug-2022 Download | |
 | radarzon | Radar Zone | - | - | 4.11 MB 06-Aug-2022 Download | |
 | radikalb | Radikal Bikers (version 2.02) | 932 kB 06-Aug-2022 Download | - | 239 kB 06-Aug-2022 Download | |
 | radm | Rad Mobile (World) | 1.18 MB 06-Aug-2022 Download | - | 336 kB 06-Aug-2022 Download | |
 | radr | Rad Rally (World) | - | - | 265 kB 06-Aug-2022 Download | |
 | radrad | Radical Radial (US) | - | - | 527 kB 06-Aug-2022 Download | |
| raflesia | Rafflesia (315-5162) | - | - | 262 kB 06-Aug-2022 Download | |
 | ragnagrd | Ragnagard / Shin-Oh-Ken | - | - | 3.81 MB 06-Aug-2022 Download | |
 | raiden | Raiden (World set 1) | 18.7 MB 06-Aug-2022 Download | - | 836 kB 19-May-2023 Download | |
 | raiden2 | Raiden II (US, set 1) | 20.2 MB 06-Aug-2022 Download | - | 559 kB 19-May-2023 Download | |
 | raidendx | Raiden DX (UK) | - | - | 601 kB 19-May-2023 Download | |
| raiders | Raiders | - | - | 460 kB 06-Aug-2022 Download | |
| raiders5 | Raiders5 | - | - | 126 kB 06-Aug-2022 Download | |
 | raimais | Raimais (World) | 76.6 kB 06-Aug-2022 Download | - | 473 kB 19-May-2023 Download | |
 | rallybik | Rally Bike / Dash Yarou | - | - | 4.32 MB 06-Aug-2022 Download | |
 | rallyx | Rally X (32k Ver.?) | 842 kB 06-Aug-2022 Download | - | 7.30 MB 06-Aug-2022 Download | |
| rambo3 | Rambo III (Europe) | - | - | 926 kB 19-May-2023 Download | |
 | rampage | Rampage (Rev 3, 8/27/86) | 6.62 MB 06-Aug-2022 Download | - | 23.5 MB 06-Aug-2022 Download | |
 | rampart | Rampart (Trackball) | 652 kB 06-Aug-2022 Download | - | 108 kB 06-Aug-2022 Download | |
 | rapidfir | Rapid Fire v1.1 (Build 239) | - | - | 640 kB 06-Aug-2022 Download | |
 | rastan | Rastan (World Rev 1) | 7.55 MB 06-Aug-2022 Download | - | 13.7 MB 06-Aug-2022 Download | |
 | rastsag2 | Rastan Saga 2 (Japan) | - | - | 3.95 MB 06-Aug-2022 Download | |
 | raverace | Rave Racer (World, RV2 Ver.B) | 667 kB 06-Aug-2022 Download | - | 153 kB 06-Aug-2022 Download | |
 | rayforce | Ray Force (Ver 2.3A 1994/01/20) | - | - | 614 kB 06-Aug-2022 Download | |
| raystorm | Ray Storm (Ver 2.06A) | - | - | 149 kB 06-Aug-2022 Download | |
 | razmataz | Razzmatazz | - | - | 545 kB 06-Aug-2022 Download | |
 | rbff1 | Real Bout Fatal Fury / Real Bout Garou Densetsu (NGM-095 ~ NGH-095) | 653 kB 06-Aug-2022 Download | - | 8.08 MB 06-Aug-2022 Download | |
 | rbff2 | Real Bout Fatal Fury 2 - The Newcomers / Real Bout Garou Densetsu 2 - The Newcomers (NGM-2400) | 762 kB 06-Aug-2022 Download | - | 8.90 MB 06-Aug-2022 Download | |
 | rbffspec | Real Bout Fatal Fury Special / Real Bout Garou Densetsu Special | - | - | 9.04 MB 06-Aug-2022 Download | |
 | rbibb | Vs. Atari R.B.I. Baseball (set 1) | 3.78 MB 06-Aug-2022 Download | - | 292 kB 19-May-2023 Download | |
 | rbisland | Rainbow Islands (new version) | 70.9 kB 06-Aug-2022 Download | - | 6.12 MB 06-Aug-2022 Download | |
 | rbtapper | Tapper (Root Beer) | - | - | 1.49 MB 06-Aug-2022 Download | |
 | rchase | Rail Chase (World) | - | - | 846 kB 19-May-2023 Download | |
| rchase2 | Rail Chase 2 (Revision A) | - | - | 220 kB 19-May-2023 Download | |
 | rdft | Raiden Fighters (Germany) | 4.20 MB 06-Aug-2022 Download | - | 566 kB 19-May-2023 Download | |
 | rdft2 | Raiden Fighters 2 - Operation Hell Dive (Germany) | 6.33 MB 06-Aug-2022 Download | - | 554 kB 19-May-2023 Download | |
 | re800v1 | Ruleta RE-800 (v1.0) | 1.35 MB 06-Aug-2022 Download | - | - | |
 | re800v3 | Ruleta RE-800 (v3.0) | 1.35 MB 06-Aug-2022 Download | - | - | |
 | re900 | Ruleta RE-900 | 1.44 MB 06-Aug-2022 Download | - | - | |
 | reactor | Reactor | - | - | 339 kB 06-Aug-2022 Download | |
| reaktor | Reaktor (Track & Field conversion) | - | - | 60.6 kB 06-Aug-2022 Download | |
 | rebel5 | Mephisto Rebell 5,0 (set 1) | 117 kB 06-Aug-2022 Download | - | - | |
 | rebound | Rebound (Rev B) | - | - | 222 kB 06-Aug-2022 Download | |
 | recalh | Recalhorn (Ver 1.42J 1994/5/11, prototype) | 35.6 kB 06-Aug-2022 Download | - | 210 kB 06-Aug-2022 Download | |
 | record | Record (Version 1) | - | 581 kB 06-Aug-2022 Download | - | |
| recordbr | Recordbreaker (World) | - | - | 219 kB 06-Aug-2022 Download | |
 | redalert | Red Alert | 1.39 MB 06-Aug-2022 Download | - | 3.26 MB 06-Aug-2022 Download | |
 | redbaron | Red Baron (revised hardware) | 7.97 MB 06-Aug-2022 Download | 4.78 MB 06-Aug-2022 Download | 1.13 MB 06-Aug-2022 Download | |
 | redclash | Red Clash | - | - | 1.14 MB 06-Aug-2022 Download | |
 | redearth | Red Earth (Euro 961121) | 6.39 MB 06-Aug-2022 Download | - | 437 kB 06-Aug-2022 Download | |
| redlin2p | Redline Racer (2 players) | - | - | 175 kB 06-Aug-2022 Download | |
| redrobin | Red Robin | - | - | 95.5 kB 06-Aug-2022 Download | |
| redufo | Defend the Terra Attack on the Red UFO | - | - | 547 kB 19-May-2023 Download | |
 | reelfun | Reel Fun (Version 7.03) | - | - | 180 kB 06-Aug-2022 Download | |
| reelquak | Reel'N Quake! (Version 1.05) | - | - | 568 kB 19-May-2023 Download | |
 | regulus | Regulus (315-5033, Rev A.) | - | - | 2.43 MB 06-Aug-2022 Download | |
| reikaids | Reikai Doushi - Chinese Exorcist (Japan) | - | - | 107 kB 06-Aug-2022 Download | |
 | relief | Relief Pitcher (Rev D, 07 Jun 1992 / 28 May 1992) | 5.77 MB 06-Aug-2022 Download | - | 9.47 MB 06-Aug-2022 Download | |
 | renegade | Renegade (US) | 3.45 MB 06-Aug-2022 Download | - | 5.00 MB 06-Aug-2022 Download | |
| repulse | Repulse | - | - | 355 kB 06-Aug-2022 Download | |
 | rescraid | Rescue Raider (5/11/87) (non-cartridge) | 178 kB 06-Aug-2022 Download | - | 124 kB 06-Aug-2022 Download | |
 | rescue | Rescue | - | - | 1.51 MB 06-Aug-2022 Download | |
 | retofinv | Return of the Invaders | 170 kB 06-Aug-2022 Download | - | 1.74 MB 06-Aug-2022 Download | |
 | retrsam | Return of the Samurai (0400549V, NSW/ACT) | - | 613 kB 06-Aug-2022 Download | - | |
 | retrsamb | Return of the Samurai (0200506V, NSW/ACT) | - | 616 kB 06-Aug-2022 Download | - | |
 | revx | Revolution X (rev 1.0 6/16/94) | 1.03 MB 06-Aug-2022 Download | - | 4.72 MB 06-Aug-2022 Download | |
| rezon | Rezon | - | - | 244 kB 06-Aug-2022 Download | |
 | rfjet | Raiden Fighters Jet (Germany) | 4.51 MB 06-Aug-2022 Download | - | 843 kB 19-May-2023 Download | |
 | ribbit | Ribbit! | - | - | 442 kB 06-Aug-2022 Download | |
 | ridgera2 | Ridge Racer 2 (World, RRS2) | 667 kB 06-Aug-2022 Download | - | 47.7 kB 06-Aug-2022 Download | |
 | ridgerac | Ridge Racer (World, RR2 Ver.B) | 667 kB 06-Aug-2022 Download | - | 210 kB 06-Aug-2022 Download | |
 | ridhero | Riding Hero (NGM-006 ~ NGH-006) | 630 kB 06-Aug-2022 Download | - | 5.45 MB 06-Aug-2022 Download | |
 | ridingf | Riding Fight (Ver 1.0O) | 35.6 kB 06-Aug-2022 Download | - | 292 kB 06-Aug-2022 Download | |
| ridleofp | Riddle of Pythagoras (Japan) | - | - | 120 kB 06-Aug-2022 Download | |
 | rimrockn | Rim Rockin' Basketball (V2.2) | - | - | 2.43 MB 06-Aug-2022 Download | |
 | ringdest | Ring of Destruction: Slammasters II (Euro 940902) | 1.90 MB 06-Aug-2022 Download | - | 338 kB 06-Aug-2022 Download | |
 | ringfgt | Ring Fighter (set 1) | - | - | 2.18 MB 06-Aug-2022 Download | |
 | ringking | Ring King (US set 1) | - | - | 1.03 MB 06-Aug-2022 Download | |
 | ringrage | Ring Rage (Ver 2.3O 1992/08/09) | 35.6 kB 06-Aug-2022 Download | - | 2.43 MB 06-Aug-2022 Download | |
| riot | Riot | - | - | 268 kB 06-Aug-2022 Download | |
| riotcity | Riot City (Japan) | - | - | 149 kB 06-Aug-2022 Download | |
 | ripcord | Rip Cord | 16.9 MB 06-Aug-2022 Download | - | 1.28 MB 06-Aug-2022 Download | |
 | ripoff | Rip Off | 6.06 MB 06-Aug-2022 Download | - | 799 kB 06-Aug-2022 Download | |
 | ripribit | Ripper Ribbit (Version 3.5) | - | - | 833 kB 06-Aug-2022 Download | |
| riskchal | Risky Challenge | - | - | 252 kB 06-Aug-2022 Download | |
| riviera | Riviera Hi-Score (2131-08, U5-4A) | - | - | 573 kB 19-May-2023 Download | |
 | rjammer | Roller Jammer | - | - | 1.43 MB 06-Aug-2022 Download | |
 | rkosmosa | Razvedchiki kosmosa | - | 12.0 MB 06-Aug-2022 Download | - | |
 | rmpgwt | Rampage: World Tour (rev 1.3) | 1.91 MB 06-Aug-2022 Download | - | 5.16 MB 06-Aug-2022 Download | |
 | roadblst | Road Blasters (upright, rev 4) | 331 kB 06-Aug-2022 Download | - | 2.09 MB 06-Aug-2022 Download | |
 | roadburn | Road Burners (ver 1.04) | 1.47 MB 06-Aug-2022 Download | - | 836 kB 06-Aug-2022 Download | |
 | roadf | Road Fighter (set 1) | - | - | 8.40 MB 06-Aug-2022 Download | |
| roadriot | Road Riot 4WD (04 Dec 1991, conversion kit) | - | - | 210 kB 06-Aug-2022 Download | |
 | roadrunm | Road Runner (Midway) | - | - | 1.00 MB 19-May-2023 Download | |
 | roadrunn | Road Runner (rev 2) | 1.24 MB 06-Aug-2022 Download | - | 4.84 MB 06-Aug-2022 Download | |
 | robby | The Adventures of Robby Roto! | 2.41 MB 06-Aug-2022 Download | - | 109 kB 06-Aug-2022 Download | |
 | roboarmy | Robo Army | 732 kB 06-Aug-2022 Download | - | 9.95 MB 06-Aug-2022 Download | |
 | robocop | Robocop (World, revision 4) | 14.1 MB 06-Aug-2022 Download | - | 1.04 MB 06-Aug-2022 Download | |
 | robocop2 | Robocop 2 (Euro/Asia v0.10) | 589 kB 06-Aug-2022 Download | - | 6.11 MB 06-Aug-2022 Download | |
| robocop2j | Robocop 2 (Japan v0.11) | - | - | 339 kB 06-Aug-2022 Download | |
 | robokid | Atomic Robo-kid (World, Type-2) | - | - | 1.83 MB 06-Aug-2022 Download | |
 | robotbwl | Robot Bowl | - | - | 263 kB 06-Aug-2022 Download | |
 | robotron | Robotron: 2084 (Solid Blue label) | 1.90 MB 06-Aug-2022 Download | - | 196 kB 19-May-2023 Download | |
| robowres | Robo Wres 2001 | - | - | 204 kB 06-Aug-2022 Download | |
 | rockclim | Rock Climber | 224 kB 06-Aug-2022 Download | - | 114 kB 06-Aug-2022 Download | |
| rockduck | Rock Duck (prototype?) | - | - | 79.9 kB 06-Aug-2022 Download | |
| rockrage | Rock'n Rage (World) | - | - | 208 kB 06-Aug-2022 Download | |
 | rocnrope | Roc'n Rope | 2.07 MB 06-Aug-2022 Download | - | 1.25 MB 06-Aug-2022 Download | |
| rodland | Rod-Land (World, set 1) | - | - | 151 kB 06-Aug-2022 Download | |
| rohga | Rohga Armor Force (Asia/Europe v5.0) | - | - | 549 kB 19-May-2023 Download | |
| roishtar | The Return of Ishtar | - | - | 343 kB 06-Aug-2022 Download | |
| rollerg | Rollergames (US) | - | - | 189 kB 06-Aug-2022 Download | |
 | rollfr_4 | Roll Fruit (080331) | 207 kB 06-Aug-2022 Download | - | - | |
| rollingc | Rolling Crash / Moon Base | - | - | 351 kB 06-Aug-2022 Download | |
 | roma32 | Mephisto Roma 68020 | 122 kB 06-Aug-2022 Download | - | - | |
 | rompers | Rompers (Japan, new version (Rev B)) | - | - | 2.05 MB 06-Aug-2022 Download | |
| rotaryf | Rotary Fighter | - | - | 141 kB 06-Aug-2022 Download | |
 | rotd | Rage of the Dragons (NGM-2640?) | 1.21 MB 06-Aug-2022 Download | - | 7.72 MB 06-Aug-2022 Download | |
| roughrac | Rough Racer (Japan, Floppy Based, FD1094 317-0058-06b) | - | - | 113 kB 06-Aug-2022 Download | |
| rougien | Rougien | - | - | 330 kB 06-Aug-2022 Download | |
| roundup | Round-Up | - | - | 176 kB 06-Aug-2022 Download | |
| roundup5 | Round Up 5 - Super Delta Force | - | - | 211 kB 06-Aug-2022 Download | |
 | route16 | Route 16 (Sun Electronics, set 1) | - | - | 239 kB 06-Aug-2022 Download | |
 | route16a | Route 16 (Centuri license, set 1) | - | - | 240 kB 06-Aug-2022 Download | |
 | royalcrd | Royal Card (German, set 1) | - | 595 kB 06-Aug-2022 Download | - | |
 | royale | Royale (set 1) | 600 kB 06-Aug-2022 Download | - | - | |
 | roypok96 | Royal Poker '96 (set 1, v97-3.5) | 599 kB 06-Aug-2022 Download | - | - | |
| rpatrol | River Patrol (Japan) | - | - | 264 kB 06-Aug-2022 Download | |
 | rranger | Rough Ranger (v2.0) | - | - | 4.13 MB 06-Aug-2022 Download | |
 | rsgun | Radiant Silvergun (JUET 980523 V1.000) | 2.45 MB 06-Aug-2022 Download | - | 154 kB 06-Aug-2022 Download | |
 | rshark | R-Shark | - | - | 645 kB 06-Aug-2022 Download | |
 | rthun2 | Rolling Thunder 2 | 2.87 MB 06-Aug-2022 Download | - | 4.55 MB 06-Aug-2022 Download | |
 | rthunder | Rolling Thunder (rev 3) | 3.35 MB 06-Aug-2022 Download | 7.34 MB 06-Aug-2022 Download | 78.1 kB 06-Aug-2022 Download | |
 | rtype | R-Type (World) | 10.8 MB 06-Aug-2022 Download | - | 6.16 MB 06-Aug-2022 Download | |
 | rtype2 | R-Type II (World) | 14.2 MB 06-Aug-2022 Download | - | 5.26 MB 06-Aug-2022 Download | |
 | rtypeleo | R-Type Leo (World) | 30.9 MB 06-Aug-2022 Download | - | 3.84 MB 06-Aug-2022 Download | |
 | rugrats | Rug Rats | - | - | 4.26 MB 06-Aug-2022 Download | |
 | runark | Runark (Japan) | - | - | 812 kB 06-Aug-2022 Download | |
| runaway | Runaway (Atari, prototype) | - | - | 291 kB 06-Aug-2022 Download | |
 | rundeep | Run Deep | - | - | 3.51 MB 06-Aug-2022 Download | |
| rungun | Run and Gun (ver EAA 1993 10.8) | - | - | 245 kB 06-Aug-2022 Download | |
| rungun2 | Run and Gun 2 (ver UAA) | - | - | 162 kB 06-Aug-2022 Download | |
 | rushcrsh | Rush & Crash (Japan) | - | - | 3.29 MB 06-Aug-2022 Download | |
 | rushhero | Rushing Heroes (ver UAB) | 1.21 MB 06-Aug-2022 Download | - | 634 kB 19-May-2023 Download | |
 | rygar | Rygar (US set 1) | 41.7 MB 06-Aug-2022 Download | 42.4 MB 06-Aug-2022 Download | 10.8 MB 06-Aug-2022 Download | |
| ryujin | Ryu Jin (Japan, ET910000B PCB) | - | - | 276 kB 06-Aug-2022 Download | |
