The Pathogen

The Pathogen is what the player will use to infect and eventually wipe out mankind.

To begin with the player may only start using a bacterial pathogen, however once a round is beaten with a bacterium on normal or hard diffculty viruses are then unlocked. There are 8 types of pathogens each unlocked by completing a round on normal or hard difficulty using the previous pathogen, each of which has a unique trait - with the exception of bacteria.

Evolutions

When setting up the pathogen, a series of evolutions are available. These evolutions are unlocked by completing unique challenges which range from completing the game in x number of days to starting your game in a given location..