Vectron (Intellivision)

Look out! The nasties are back and they're after your energy bases. Hungrees, Splitters, Diamondbacks and Prizums (to name just a few) gobble up your bases and attack your energy block. Build a base before they can tear it down and you advance to the next game level with more points and meaner nasties to confront. 00 game levels are possible. We dare you to get past level 10.