1. Start the game by selecting a DIFFiculty level. THere are three DIFFiculty levels: Easy, Normal, and Hard.
2. You will then be presented with a board of Viruses. Your Goal is to eliminate all of the Viruses on the board.
3. Click on a Virus to select it. You can then move the Virus around the board by clicking on empty Squares.
4. When you move a Virus onto an adjacent Square, it will infect that Square. If the Square is already infected, the Virus will die.
5. Your Goal is to eliminate all of the Viruses on the board. You can do this by either killing them off or by creating chains of Viruses that will eliminate each other.
6. As you progress through the game, the Viruses will become more DIFFicult to eliminate.
7. When you have eliminated all of the Viruses on the board, you win the game!