In the process of adding game reviews to the Interton VC 4000 Gaming Guide (http://amigan.1emu.net/igg/) I found the following review. I have not been able to ascertain any other information about this game. It doesn't seem to match any of the known games, I assume it must have been cancelled at the last moment? Does anyone have further information about it?

"GALAXIS

An advancing troop of alien marauders armed with deadly laser weapons are
attacking your space fighter. You must destroy the aliens before they get
your ship.
  In Galaxis you must fight off wave after wave of invading creatures.
  This game is a version of the arcade game Galactica [sic]. Your ship is given
three chances to build up the highest score possible. A series of invaders
move across the top of the screen and suddenly peel off in formation
swooping down towards you.
  Motherships also join up the invading ranks and these perform a similar
swooping action in an effort to out-manoeuvre your space fighter.
  Bonus ships are given when you reach a certain number of points and this
game gets more difficult as it progresses. The more aliens you blast out
of the sky and the more waves you complete the faster the subsequent
attack will be.
  This is the latest game out for the Interton VC 4000 television games
centre. It's a 4K ROM cartridge and can be found at Interton stockists for
19.95 from June."

- Computer & Video Games magazine, issue #8 (April 1982), p. 22.