Majestic Twelve: The Space Invaders Part IV/Versions

Sega Genesis
Developed directly by Taito Corporation in 1990 and released in Japan as "Space Invaders '90", then later released in the US in 1991 under the name of "Space Invaders '91" (strangely, with no mentioning of the word "Super" in the title).

Commodore Amiga
Developed by "The Kremlin" and Domark in 1991 and released in the EU as "Super Space Invaders" (no sign of "'91"); was also released on a dual cartridge with a conversion of Atari Games' Pit Fighter (which was also released in 1990).

Commodore 64
Developed by Domark in 1991 and released in the EU as "Super Space Invaders" (again, with no mentioning of "'91"); this conversion's very similar to the Commodore Amiga one that has been described above only with inferior graphics.

Amstrad CPC
Developed by Domark in 1991 and released in the EU as "Super Space Invaders" (again, with no mentioning of "'91"); this conversion's very similar to the Commodore Amiga and 64 ones described above only with more inferior graphics.

Sega Game Gear
Developed by Tiertex Design Studios and Domark in 1993 and released in the US and EU as "Super Space Invaders", again with no mentioning of "'91"; this particular conversion of the game was released later than all of the other ones.

Sega Master System
Developed by "The Kremlin" and Domark in 1991 and released in the EU as "Super Space Invaders" (no sign of "'91"); this conversion is very similar to the Commodore Amiga, Commodore 64 and Amstrad CPC versions described above.

Atari ST
Developed by "The Kremlin" and Domark in 1991 and released in the EU as "Super Space Invaders" (no sign of "'91").