 | Rod-Land (World) | 1990 | Jaleco | rodland | Platform / Run Jump | 9.29 |
| | Rollergames (L-2) | 1990 | Williams | rollr_l2 | | 0.00 |
| | Rollergames (LG-3) Germany (clone of: rollr_l2) | 1990 | Williams | rollr_g3 | | 0.00 |
| | Rollergames (LU-3) Europe (clone of: rollr_l2) | 1990 | Williams | rollr_l3 | | 0.00 |
 | Rolling Thunder 2 | 1990 | Namco | rthun2 | Platform / Shooter Scrolling | 7.83 |
| Rolling Thunder 2 (Japan) (clone of: rthun2) | 1990 | Namco | rthun2j | Platform / Shooter Scrolling | 0.00 |
| | Rough Racer (Japan, Floppy Based, FD1094 317-0058-06b) | 1990 | Sega | roughrac | | 8.50 |
 | Runark (Japan) (clone of: growl) | 1990 | Taito Corporation | runark | Fighter / 2.5D | 0.00 |
 | RyuKyu (Japan, FD1094 317-5023) | 1990 | Success / Sega | ryukyu | Puzzle / Cards | 4.00 |
 | Senjou no Ookami II (Japan 900302) (clone of: mercs) | 1990 | Capcom | mercsj | Shooter / Walking | 0.00 |
| | Shadow Dancer (Mega-Tech) | 1990 | Sega | mt_shado | | 0.00 |
 | Shuuz (version 7.1) (clone of: shuuz) | 1990 | Atari Games | shuuz2 | Sports / Horseshoes | 0.00 |
| Shuuz (version 8.0) | 1990 | Atari Games | shuuz | Sports / Horseshoes | 6.33 |
| | Silver Slugger | 1990 | Gottlieb | silvslug | | 0.00 |
| | Skill Cash (v1.1) (MPU4 Video) | 1990 | Barcrest | v4sklcsh | | 0.00 |
| | Skill Trek (v1.1) (MPU4 Video, set 1) | 1990 | Barcrest | v4skltrk | | 0.00 |
| | Skill Trek (v1.1) (MPU4 Video, set 2) (clone of: v4skltrk) | 1990 | Barcrest | v4skltrka | | 0.00 |
 | Sky Smasher | 1990 | Nihon System | skysmash | Shooter / Flying Vertical | 7.00 |
 | Slick Shot (V1.6) (clone of: slikshot) | 1990 | Grand Products/Incredible Technologies | slikshot16 | | 0.00 |
| Slick Shot (V1.7) (clone of: slikshot) | 1990 | Grand Products/Incredible Technologies | slikshot17 | | 0.00 |
