They are the plague of the galaxy, converting entire planets into volcanic rubble. They are closing on Earth and you are our last line of defence. It's time to fight back! They must be exterminated. Die Alien Scum! This is the all-time greatest arcade classic updated. Eliminate waves of enemies as they descend towards you, spitting bolts of acidic venom, crackling lines of energy and balls of fire. Grab useful power-ups, including side-cannon ammo, extra shields and speed-boosts. Watch for the mother-ship as she attempts to replenish the enemy ranks. And be prepared for the all-powerful alien boss, the Fleet-Master, armed to the teeth and able to shield itself from your attacks!