Grow your colored virus so it fills all the cells before you run out of attempts. You always start in the lower left corner, a green radar will show you which cell you start with. You grow your virus by clicking on a color at the bottom of the screen. The cells that you own and all the cells that are touching your virus will change to that color. You only have a set number of attempts to fill the screen. If you fill all the cells before you run out of attempts you will get 100 points plus you will earn 10 points for each attempt leftover. If you fail to fill the level no bonus points will be added. Your score will also advance based on how many cells you control each turn, one point for each cell you control. Best Virus 2 games.