Your mission in this cool strategy game is to smash the defences of the best hackers in the world while not leaving your computer vulnerable. build a wide arsenal of malicious programs and smash the defenses of all the best hackers in the world. use your mouse to place defense turrets. to upgrade a turret, click on it on your defence grid. click the up green arrow to upgrade. to research a malware click on an icon which is not active yet. you can also press the key corresponding to the letter at its top right. good luck!
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