Just uploading all the info i still got from videopac.org.
We'll the game was produced by a company called GST-video. They have also programmed these videopac+ titles: Super Bee, Norseman, and Blobbers and the never officiale released games: Interpol and Shark Hunter. The last 2 have been released by videopac enthusiast.
This game was formaly knows as 'jake', but this year it was discoverd that the real name is "martian threat".
I tested the game with steelballs from the videopac.org website here's the reveu:
Martian Threat
Allready on our second try we got our highscore into the 1000 points. It's graphical a great game. It doesn't use + graphics but it still is one of the most
inpressive graphical games that uses standard g7000 hardware.
For game play, well we didn't like it to much. The only thrill is to get a higher score every time you play. It is not very hard to get into 1000 points and
the game never is very tactical. What we did notice is that if you die with less then 1000 point, the end screen shows a ufo shooting at the earth, and when
the earth is hit it turns red.
The first time you get 1000+ points and you die you get a differnt ending.
This time there's a shot from earth that hits the ufo. The ufo then breaks into pieces. After this the only time you see this ending again is by getting a higher highscore.
What is know of GST-Video:
Comes from a interview with Jon Shuttleworth.
"We used a few of the designs that came from Magnavox but thought that the "peaceful" Europeans would like things more slanted to their "delicate" taste, so we either thought them up ourselves and had somebody make mock-ups, or we used a Swedish company in Vittslo (I've forgotten the name) to design the game, and then we had it programmed by a contract program company called GST, which was already doing a lot of serious program work for Philips. That's why they called it GST Video so as to distinguish it from the "real" program work. "
Screenshot can be found here:
http://odyssey2.classicgaming.gamespy.com/db/game.php?gameid=124picture of the cart
http://members.home.nl/patrickselten/videopac/martian%20threat.jpg