It is the year 3000 and you are a network security engineer. You must use your virtual arsenal to prevent the waves of viruses from destroying the server's firewall. Sadly your department's budget was recently cut, so you're income must come from bounties collected on the viruses. The viruses themselves come in a variety of types, colors and sizes. The larger and more advanced types are harder to kill but provide a larger bounty. The viruses have recently begun attacking in waves every twenty seconds.