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This title is 21 ways, including regional variants, revisions and unofficial ones. Even under the same title, the contents differ by region and date.
| No | Year | Title | Maker | Notes |
|---|---|---|---|---|
| 1 | 1981 | Scramble (original) | Konami | |
| 2 | 1981 | Astro Ambush (Scramble bootleg on Galaxian hardware) | bootleg (U.C.E.) | |
| 3 | 1981 | Explorer (bootleg of Scramble) | bootleg (Sidam) | |
| 4 | 1981 | Impacto (Billport S.A., Spanish bootleg of Scramble) | bootleg (Billport S.A.) | |
| 5 | 1981 | Kamikaze (Euromatic S.A., Spanish bootleg of Scramble) | bootleg (Euromatic S.A.) | |
| 6 | 1981 | New Century (Spanish bootleg of Scramble) | bootleg (Petaco S.A.) | not emulated |
| 7 | 1981 | Offensive (Spanish bootleg of Scramble) | bootleg (Video Dens) | |
| 8 | 1981 | Scramble (Centromatic S.A., Spanish bootleg) | bootleg (Centromatic S.A.) | |
| 9 | 1981 | Scramble (Karateco, French bootleg) | bootleg (Karateco) | |
| 10 | 1981 | Scramble (Model Racing, Italian bootleg) | bootleg (Model Racing) | not emulated |
| 11 | 1981 | Scramble (Petaco S.A., Spanish bootleg) | bootleg (Petaco S.A.) | |
| 12 | 1981 | Scramble (Recreativos Franco, Spanish bootleg) | bootleg (Recreativos Franco) | |
| 13 | 1981 | Scramble (Stern Electronics, set 1) | Konami (Stern Electronics license) | |
| 14 | 1981 | Scramble (Stern Electronics, set 2) | Konami (Stern Electronics license) | |
| 15 | 1981 | Scramble (bootleg?) | bootleg? | |
| 16 | 1981 | Scramble (unknown bootleg) | bootleg | not emulated |
| 17 | 1981 | Sea Invasion | Hoei | not emulated |
| 18 | 1981 | Space Trek (Video Game S.A., Spanish bootleg of Scramble) | bootleg (Video Game S.A.) | |
| 19 | 1981 | Strafe Bomb (bootleg of Scramble) | bootleg (Omni) | |
| 20 | Unknown | Bomber (bootleg of Scramble) | bootleg (Alca) | |
| 21 | Unknown | Space Mission (SegaSA / Sonic, Spanish bootleg of Scramble) | bootleg (SegaSA / Sonic) |
From this title you can move to the same year, the same maker, and the same board.