Has saving humanity become routine? Spice Pandemic up with new roles and events. Add a fifth player, try Legendary difficulty, or add an optional challenge: What if one disease is particularly nasty? Or, if a fifth disease is wreaking havoc? Or, even worse, if that fifth disease is being spread by a hidden Bio-Terrorist? Can your team work together to cure diseases in a world on the brink of disaster? This is an expansion requires Pandemic to play.