Listing all games similar to Scramble (bootleg on Galaxian hardware)

Super Cobra »
[MAME] Super Cobra (bootleg)[MAME] Super Cobra (Sega)[MAME] Super Cobra (Stern)[MAME] Super Cobra [2600] Super Cobra (1982) (Parker Brothers, Mike Brodie) (PB5320)[5200] Super Cobra (1983) (Parker Bros)
Cosmic Avenger »
[MAME] Cosmic Avenger
Vanguard »
[MAME] Vanguard (Centuri)[MAME] Vanguard (SNK)[MAME] Vanguard (Japan)[2600] Vanguard (1982) (Atari - GCC, Dave Payne) (CX2669)[5200] Vanguard (1983) (Atari)[MAME] Vanguard (Centuri)[MAME] Vanguard (Japan)
Penetrator »
[C64 PP] Penetrator (U)[ZX Spectrum Z80] Penetrator (1982)(Melbourne House)[a][ZX Spectrum Z80] Penetrator (1982)(Melbourne House)[ZX Spectrum (TAP)] Penetrator (1983)(Melbourne House)
Caverns of Mars »
[Atari 800] Caverns of Mars (1981)(Atari)[Atari 800] Mars
Gradius »
[MAME] Gradius [MAME] Nemesis [MAME] Nemesis (World?)[MAME] Gradius (PlayChoice-10, older)[MAME] Gradius (PlayChoice-10)[NES] Gradius (ArchiMENdes Hen) (Japan)[NES] Gradius (Europe)[NES] Gradius (Japan)[NES] Gradius (USA)[X68K] Gradius (1987)(Sharp - SPS)[a2][X68K] Gradius (1987)(Sharp - SPS)[a3][X68K] Gradius (1987)(Sharp - SPS)[a4][X68K] Gradius (1987)(Sharp - SPS)[a][X68K] Gradius (1987)(Sharp - SPS)[h2][X68K] Gradius (1987)(Sharp - SPS)[h3][X68K] Gradius (1987)(Sharp - SPS)[h][X68K] Gradius (1987)(Sharp - SPS)[TG16] Gradius (Japan)[C64 PP] Gradius (U)[MAME] Nemesis (World?)[MAME] Nemesis
Gradius III »
[MAME] Gradius III (Japan)[MAME] Gradius III (Asia)[MAME] Gradius III (World ?)[SNES] Gradius III (Japan)[SNES] Gradius III (USA)[MAME] Gradius III (Asia)[MAME] Gradius III (World ?)[MAME] Gradius III (Japan, program code S)
Gradius II »
[MAME] Vulcan Venture [NES] Gradius II (Japan)[MAME] Vulcan Venture (Old)[MAME] Vulcan Venture (Oldest)
Gradius V »
[PS2] Gradius V (USA)[PS2] Gradius V (Japan)[PS2] Gradius V (Europe) (En,Fr,De,Es,It)
Gradius III and IV »
[PS2] Gradius III and IV (USA)[PS2] Gradius III and IV (Europe)
Gradius IV Fukkatsu »
[MAME] Gradius 4: Fukkatsu
Fortress Underground »
[Amiga] Fortress Underground