You are a highly sophisticated system called Exadi and you have to clear out the viruses that have infected a server. Shoot all the viruses, buy upgrades and clear the server. You can save your progress online.
Enjoy playing Viricide!
Use the arrow Keys or W,A,S,D keys to move, Use mouse to aim and shoot. Press the Space bar to use Zero Writes when you have purchased at least one. Press P to pause game.