You have several types of plague at your disposal, each with different abilities: the bacteria, the virus, the fungus, the parasite, the nano-virus, the bio-weapon and the prion. In this game, the timing of your actions is as important or more than the actions themselves. For example, if your pathogen is too deadly before it is sufficiently spread, scientists will detect it and then, since the infection will be very localized, it will be easy for them to eliminate it. Once you contaminate your Patient Zero with your creation, you must manage your pathogen's evolution to ensure that it spreads around the world. Plague Inc: Evolved invites you to create a new pathogen (SoftonicPedia explains: 'which causes or produces disease').