Single Player, HD (High Definition)The 1987 classic returns with special effects andd dolby sound! Pilot your ship through 60 waves, collecting crystals and evading the Nasties. These unique baddies - each one different - emerge from portals on each side of the screeen. Fire your weapon at them, or deploy a smart bomb to vaporize every Nasty on thge screen. Grab all the crystals to open the gateway at the bottom of the screen. And don't forget to gather up the goodies in each wave. you can find bonus point, extra smart bombs and even an pccasional mega-crystal for massive points!