 | Scramble (bootleg on Galaxian hardware) (clone of: scramble) | 1981 | bootleg | scramblb | Shooter / Flying Horizontal | 0.00 |
| Scramble (bootleg) (clone of: scramble) | 1981 | bootleg | scramb2 | | 0.00 |
| Scramble (bootleg?) (clone of: scramble) | 1981 | bootleg? | scramblebb | | 0.00 |
| Scramble (Karateko, French bootleg) (clone of: scramble) | 1981 | bootleg (Karateko) | scramblebf | | 0.00 |
| Scramble (Stern Electronics) (clone of: scramble) | 1981 | Konami (Stern Electronics license) | scrambles | | 0.00 |
| | Silver Land (clone of: rpatrol) | 1981 | Falcon | silvland | Sports / Skiing | 0.00 |
 | Sky Skipper | 1981 | Nintendo | skyskipr | Shooter / Flying | 6.00 |
| | Solar Fire (L-2) | 1981 | Williams | solar_l2 | | 0.00 |
 | Solar Fox (upright) | 1981 | Bally Midway | solarfox | Maze / Shooter Small | 5.00 |
 | Solar Quest (sample of: solarq) | 1981 | Cinematronics | solarq | Shooter / Field | 3.67 |
 | Space Bugger (set 1) | 1981 | Game-A-Tron | sbugger | Unplayable | 0.00 |
| Space Bugger (set 2) (clone of: sbugger) | 1981 | Game-A-Tron | sbuggera | | 0.00 |
 | Space Cruiser | 1981 | Taito Corporation | spacecr | Shooter / Gallery | 4.50 |
 | Space Dungeon | 1981 | Taito America Corporation | sdungeon | Shooter / Field | 5.00 |
 | Space Fortress (CVS) | 1981 | Century Electronics | spacefrt | Shooter / Misc. | 4.13 |
 | Space Fortress (Zaccaria) (clone of: starcas) (sample of: starcas) | 1981 | Cinematronics (Zaccaria license) | spaceftr | | 0.00 |
 | Space Fury (revision A) (clone of: spacfury) (sample of: spacfury) | 1981 | Sega | spacfurya | | 0.00 |
| Space Fury (revision B) (clone of: spacfury) (sample of: spacfury) | 1981 | Sega | spacfuryb | | 0.00 |
| Space Fury (revision C) (sample of: spacfury) | 1981 | Sega | spacfury | Shooter / Field | 5.82 |
 | Space Odyssey (version 1) (clone of: spaceod) (sample of: spaceod) | 1981 | Sega | spaceod2 | | 0.00 |
