Product Description Pandemic: On the BrinkYouve found the cures to four deadly diseases. But what happens when those diseases get stronger? Worse yet, what happens when someone spreads them intentionally?! Return to the world of Pandemic with On the Brink and prepare for the unexpected. The three challenges included with this expansion evolve the base game mechanics in exciting ways. One disease might become a Virulent Strain and become more difficult to treat as the game goes on. Or you could introduce an unpredictable fifth disease with the Mutation challenge and watch it pop up in unexpected places. Finally, teamwork is even more important if a fifth player dons the mask of the Bio-Terrorist and spreads panic while moving secretly across the board. Try each challenge individually or combine them all for a major test! From the Manufacturer 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?.