A list of all the official Ultimate Play the Game releases, plus known, completed homebrew conversions, remakes, and unreleased titles.
Martianoids was released in 1987 on three different formats: ZX Spectrum, Amstrad CPC, and this MSX conversion. All three are pretty much identical in terms of gameplay; they feature a robot, walking through nine sectors of a scrolling landscape, fighting off alien robots that are trying to destroy a computer you are defending.
The Amstrad CPC version of Martianoids is arguably slightly better than the ZX Spectrum version, because it has a couple more on-screen colours to play around with. It plays the same as the Spectrum version, but looks a little better. The scrolling and control responsiveness seem a little slower, though.
Ultimate Play the Game‘s 1987 release, Martianoids, is another US Gold attempt to recreate the thrills and spills of a genuine Ultimate game and failing miserably.
You can find some indication of this if you type “Martianoids longplay” into YouTube and seeing that there aren’t any videos. Almost every other Spectrum game has someone playing through it on YouTube; definitely every other Ultimate game, but not this one.