I have this memory of 5-6 little aliens crash on earth... on holloween... I know this because I remember the little martians go trick or treating with the kids... should be late 80 - early 90s
I know when I remember it ill kick myself... thanx

Sounds like this one;

Spaced Invaders (1990) (http://www.imdb.com/title/tt0100666/)

Sounds like this one;

Spaced Invaders (1990) (http://www.imdb.com/title/tt0100666/)

I forgot the d in spaceD invaders... thanx gekko... ill kick myself a good one for you to.
Thanks again...