Plague Inc: Scenario Creator is a versatile app designed for players to invent unique scenarios within the game Plague Inc. Users can craft new diseases, environments, and events, setting personalized rules for gameplay. The scenarios can be shared with friends or published globally, reaching over 85 million players. With access to five specialized laboratories, users can enhance their creations and engage with a wider community through social networks, adding a creative twist to the existing Plague Inc. experience. Note that the base game must be installed to play the custom scenarios created.