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Those Insectus are back again! It seems that you've defeated them completely in the previous versions of Star Defender games but new version - Star Defender 4 - claims that you were absolutely wrong! The dreadful creatures are about to swallow one of your bases and then conquer our beloved planet Earth. So the bosses decided to send you to the base to prevent the invasion and allow the Earth's forces gain time. However, your trip through the black hole was not the most successful one and you find yourself somewhere in the open space. What a surprise! The Insectus creatures are here as well disturbing one unknown civilization. In the game Star Defender 4 you try to get in contact with the suppressed creatures in attempt to receive some help. Anyway, your spaceship has been seriously damaged during the journey and you start the first level with the primitive weapon and shield. However - as usual - you can upgrade your armor and you'd better do it the soonest possible. Use your primary gun with the unlimited supply of shots and earn something more powerful. Use right mouse button and infect your enemies. Or shoot them with rockets. There are various weapons at your disposal! Download the stunning game Star Defender 4 absolutely for free now and learn what else you can do to beat off the enemies' waves. Great music and nice backgrounds will definitely amaze you to say nothing of the thrilling sounds effects which help you dive in the game completely!