Pandemic on The Brink Expansion Board Game

This expansion to Pandemic includes new event cards, new role cards,
rules for five players, and optional game challenges to increase the
difficulty, such as the 'Legendary' difficulty level, the Virulent
Strain challenge, the Mutation challenge, and the Bio-Terrorist
challenge. These challenges can be mixed together to make the game even
harder.Virulent Strain challenge: makes one disease become particularly
deadly in unpredictable ways.Mutation Challenge: adds a fifth (purple)
disease that behaves differently than the original four.Bio-Terrorist
Challenge: pits one player against the others!You may also play with 5
players and play on Legendary level!Other components include petri
dishes to store your diseases and pawns.On the Brink version
differences:116 cards from the base game (with some corrections) only 7
pawns (small-size)On the Brink requires a copy of Pandemic to play; it
is not a stand-alone game.