Capricorn,
There are so many different versions of that game you are talking about... One version, if I can remember, was "Qix"... something like that. You had to take over at least 85% of the board to win that round.
I am not sure if this helps you, but you may want to do a Google search using "Qix" as one of your search terms.
Good luck in finding the name,
-SlickVic78